Always respect the 1v1…
I’ve watched Horde jump an Alliance right in front of me… probably thinking I’m going to join in, but I won’t unless the numbers become unfair for the Horde of course. And there’s been times I’ve seen the Alliance getting jumped by that Horde win… I’ll give a respectful /nod or /applaud and go about my business.
When I get into an Arena Skirmish and the other teams partner doesn’t show up, I always request if I can get the 1v1… to make it fair, and if I lose (lol) my partner can finish mopping up the mess.