Unlocking handhelds is less of a problem because it requires deliberate action to break the rules. There are fewer people willing and able to do that.
Regardless, the Quansheng UV-K5 is largely supplanting the Baofeng as the go-to entry level HT, the 3rd party firmware for that radio is pretty impressive.
Are modern varieties truly locked or just “locked ;)” ?
1. Decrypting those communications if they are encrypted
and
2. Selling equipment designed to receive on those bands.
Of course there's not much purpose in sitting around listening to the digital chirping noises of encrypted traffic, but as I understand it, if that's your hobby, that part is actually legal.
(Also a licensed US ham, not not an expert in anything in particular and definitely not a lawyer)
[0] Wikipedia also mentions the existence of cloning tools that would let you copy any AMPS subscriber ID and program another phone with the same number, stealing the subscriber's account. I suspect AT&T was more angry about that.