It's a nasty line.

Really, I think this site underestimates the value of "Go fuck yourself" when someone says stuff like that. Being polite isn't going to help them pull their head out of their ass.

That approach is against site guidelines, and for good reason. If one nasty comment is grounds to engage in a flamewar, this place is going to lose any ability to have a reasoned conversation.

I mean, if you reply "Go fuck yourself" you are probably done with the thread, not planning engaging further with the asshole.

Really, my point is that there is too much effort to engage assholerly as if it is actually reasoned conversation, when it is just assholery. Maybe we could go with the milder "This is ridiculous" as a reply or something.

Just downvote and flag. If it's genuinely negative behavior, the mods will usually deal with it.

If you're going to reply, it's better to give the uninformed reader some idea why it's ridiculous, rather than just the bare claim that it is. But hey, I just told someone that their post was "paranoid drivel", so I'm maybe not the best one to talk...