It already is, at least IP lawyers should be aquainted with the term, even some scholarly articles at ssrn.com use it. But it probably wouldn't be a prominent term in judgements, because it is too broad and doesn't describe "what the troll did and why it is bad", so it isn't really useful in that sense. I guess the standard formulations would be more like "abusive conduct" etc. (My own jurisdiction isn't angloamerican)