I love it! I literally thought of something similar while writing the above comment, something like an EMP that disables all nearby camera sensors for 10min or so.
Some years ago, there was a guy that got arrested (may have been in Chicago), for riding on the train, and running a cellphone jammer, because he hated people on the phone, while on the train.
Might be considered somewhat similar. It could definitely earn you a beatdown, if someone catches you.