Any kind of criticism is good criticism
Let's go with "no" for a thousand, Alex.
Unfounded criticism is as bad as it is
useless, and should be rejected out of hand. It serves no purpose for anyone but the critic (if that), and considering it is a waste of time and effort.
And while not a hundred percent correlation, I've found a very strong negative trend between use of vulgarity and insult and the usefulness of criticism. As one goes up, the other tends to go down proportionately. There's exceptions, of course, but they're rare -- and usually only effect the intensity of the trend, not its existence.
Especially if you're having to deal with a large body of such things, or your ability to filter data is time constrained, it's highly likely that adopting the heuristic "reject criticism that includes insults and/or vulgarity" is one that is going to effect the benefit you gain from considering what criticism you deal with very, very little.