Of course it is. What does that have to with Americans using affectations?
The only time I remember such is when it’s that one thread about trolls. Sure, a single post defending yourself from the accusation makes sense, but often posters will essentially hijack the thread to discuss only them.
The closest other thing I can think of is when the Pittee doesn’t so much defend themselves but say things that only makes it worse. In that case, you’d be better off just not responding at all.
Otherwise, it’s usually the opposite complaint, that the poster gets Pitted a lot but never replies at all or otherwise acknowledges that people are mad at them.