How do I report a named kill steal?

[alarius]

Super friendly in here this morning.

OP, I don't think there's much you can do without logs. Screenshot is nice, but it doesn't really show any of the lead-up, just one dude being a snarky asshole. Keep OBS running next time, along with aforementioned logs, and let the other player know ahead of time to cover your own ass incase GM's have to get involved. But usually telling people what's up is enough to get them to move along.

Sorry this happened, hopefully it's a non-issue next time. Good luck.