[gvedem]

"abusive", really? you can debate their merits without hyperbole. it's not clear to me that you bothered to read past any of the headlines.

1. is explicitly given the caveat "when not immediately helpful". 2. is rude, regardless of whether it is helpful. if you want to help, join in and actually help. 3. is difficult to imagine ever being helpful, and when feigned is obviously not ordinary, but an obnoxious affectation. 4. has nothing whatsoever to do with being helpful.

I'll leave determining what is ordinary or authentic to others, but suffice to say I don't think either of those things is consistent case to case.