Uneven wear usually means something is wrong (bad /stuck/seized caliper pin, something bet that shouldn’t be, improperly seated pad or rotor, etc.). I wouldn’t call it dangerous, but things that are other things that manifest in uneven brake pad wear that you might want to take a peek at, and those things can be dangerous (such as a failing wheel bearing).

This just looks like run-of-the-mill sticky caliper or bad guide pins, though.