[Natsu]

Well, the only part of a DMCA claim that you swear to be true under penalty of perjury is simply that you are authorized to represent the copyright holder of the work you're claiming is infringed upon.

Not saying you can't get in trouble for anything else, I just haven't seen that yet, other than some out of court settlements (I don't remember yours, but I've heard about others).

I certainly do wish that more people would bring some of the utterly bogus claims to the attention of the relevant courts or bar associations (assuming they bear the signature of an actual lawyer).