@Shadman;1521219]Ah, radios. great topic.
1. As these radios are 4 watts output, only FRS 1 - 7 are technically legal.
You may already know all of this but for those who do not, (and not to be geeky or whatever) but what you say is generally true -- in the USA. Every country has their own version of the FCC which sets laws and policies on the use of the frequency spectrum in that country. In highly developed countries, regulation of frequency usage (including modes of transmission, power, license type, etc.) can -- and often is -- pretty rigidly enforced. In developing countries, often less so.
However, it's actually pretty easy to locate a bandit station.
I won't bore you with the details but I've learned the information I'm sharing by doing a lot of "interesting" work in many dodgy countries. You may have different experience, which is awesome!
My radio experience in developing countries is NOT in Mexico, so take this with a pinch of salt... but in many developing countries you can generally assume the following related to 2-way radio possession and use (true in S. America and Africa anyway):
1. The government will usually overlook it if you're not bothering anybody with too much use (transmission), interfering with legal frequency usage, using foul language, or broadcasting with too much power, and if for a "credible reason," such as safety. However, they could use it as an excuse to hassle you or seek a bribe. Exception is if you have an internationally recognized license such as a USA FCC Amateur license or similar, in which case use has to conform to that country's laws. In general, as with a camera, it's best not to be too obvious about having a radio or antenna near military, police or other critical infrastructure facilities or operations such as airports, border crossings, checkpoints, government buildings, military facilities, antenna installations/towers or other critical infrastructure, etc.
2. Authorities (and everyday people) associate 2-way radios with government/military, spies and smugglers. When I lived in Nairobi a UN colleague of mine was shot during a robbery because he had a hand-held radio and the bad guys assumed he was an undercover cop.
3. The government (especially military and intelligence) may be monitoring depending on different factors. Maybe you don't care; maybe you do.
4. Bad guys also use radios and so may overhear your traffic. I do know for an absolute fact that narcos use very high tech radios, scanning receivers, and radio communication techniques (encryption, automated frequency hopping, duplex repeaters, net control stations, communications plans, etc.). They may use what you say to plan a robbery/kidnapping or to do other unpleasant things to you/your team - if you give them specific, actionable and timely information useful to that end.
So in general, it's good to say as little as possible on the radios both in terms of how often people talk and how specific they are when they talk. It's best to avoid the use of peoples' names, unique locations, times, etc.
To avoid unwanted government attention is helps to minimize radiated power (how many watts you're using), too much unnecessary chatter, and certainly any foul language.
An analogy: Legally, running your high beam or maybe even racing lights on your motorcycle during the daytime is illegal, but most cops will overlook it because they know you're doing it for safety reasons. Same with the radios. If you're not consuming too much radio spectrum or time and it sounds safety related, then they tend not to bug you. And if your're not giving away people's names (first and last name to LinkedIn to income and Facebook for family = good hostage targets), and if you're not telling bad guys where you are and when and so on, they they may know you're there but not be able to find you or plan ahead.
Anyway, not trying to scare monger. I try to be realistic and neither under nor overestimate risks. Having said that, two of my colleagues in Africa were taken hostage -- one from within an organized, fenced refugee camp -- and I've heard both their stories, and it not a story you want to tell about yourself. So wisdom -- and neither fear nor naive, John Wayne bluster dismissing all threats - is the way I try to roll. I like to know the threats and mitigate - not ignore or overreact to - them.
Of course everything I just said kinda applies in the back-country of Texas, Colorado, Utah, etc.
I'm sharing this so that we CAN use radios to mutual benefit and so that we are not hassled by anyone while in beautiful Mexico, eating awesome Mexican food and meeting and making new friends with wonderful rural Mexican people!
I like the idea of having a short communications planning meeting in person in the USA a day or so before we cross the border, or in a private forum online; not in this open forum. But hey, that's just my opinion!
I just want to have fun and explore with some great people - Mexicans and "Americans"! Let's go!