This is really admirable of you. To be clear, you have nothing to defend, you only had to point out how shitty other people are.
Also, what argument? Does the fact that the lady in question did not have anything to defend against, nothing to be ashamed of, really hinge on the exact definition of the shittyness of reddit trolls? Heh. So it's simply a statement. And if you disagree that such behaviour is shitty, make your case. If you don't, I really wonder what we're even talking about here.