Don’t mean to muddy the waters here but I believe most of the FPV equipment on the market today has FCC certifications that make them legal for normal consumer use. If it is some overseas ‘stuff’ that didn’t go through the FCC certification process it is illegal for use in the US and I’m willing to bet many FPV users either are not aware of that or ignored it. I think where there is really a problem is when certified equipment is modified by the user, especially when boosting power.

Regards
Frank