This is a problem for pvp. I can’t tell which raidframe is a vehicle until I waste my heals on it, and even then I can’t tell when they dismount. Is there some kind of indicator I can enable?
edit: Enhanced Raid Frames, /erf, indicator options, pulldown 5 middle center, spellid=23335, inidcator size 30. this is for vehicles in Battle for Wintergrasp. check the name of the aura for people in other vehicles in other BGs and find it on wowhead, look for spellid in the url. gl!