The FCC cares a lot, to the tune of $25k:
https://www.fcc.gov/document/fcc-fines-ca-amateur-radio-oper...Anyone who makes a habit of transmitting on a frequency they are not authorized on WILL be caught eventually, especially if they are interfering with police, emergency services, business users, and broadcasters. And all of these are very easy to do if you own a Boafeng and don't know how to use it.