I think I know lawn gnome, and judging from how terrible it is to stand directly in front of a door like that, I'd guess he was kind of egging them on. Not to say either is acceptable, but not nearly definitive enough to warrant any actions being taken by administrators.
Edit: This thunderhorse guy on the other hand, blatantly team bumping, but you posted that in the "other" section not the NA community section so... somewhat unrelated.
completely ignores troublesome griefing for hours
I'd like to point out that this is the guy that 'downloaded auto-block in order to make a video proving that SaulCanner uses auto-block', Gnome's shown he's not beyond breaking rules to get someone banned. Compared to installing a hack, getting yourself killed to take screenshots is extremely mild.