If he is calling them out for a good or true reason I don't consider it trolling. However you are right if he is doing it just to be an a****** and commenting negatively on totally to benign and positive type posts then he's gotten a silent treatment he deserves
@Tumbleweed That’s why I’ll also take a look at posts showing pics from supposedly very young women to see who’s simping on them. Sometimes I’m surprised at the users I see there but despite being disgusted, it helps me to compose my “pervs to avoid” list.