I always post a lower res image and watermark it, but that doesn’t really take away from anything here. The real issue is the entitlement of these people to use your work for their gain and get upset about it when you say no.
You can’t catch them all, but when you do, it doesn’t void your rights just because someone else is getting away with it.

I mean, if it’s AI generated I’m just gonna scroll on by. Why steal it when I could generate it myself? Gotta admire the plethora of accounts who’ve managed to amass followings and sales from AI content though, good job on taking advantage, but it’s sad when they try to pass it off as genuine photos.