This is a touchy subject for a lot of people. Some believe that other players in the group should be priority over someone's companions, while others believe that if a companion can use it, they have a right to need on it.
Personally, I'm going to see how others start rolling and do the same. If people start rolling for companions, then I'll do the same for that group.
agreed, I always delay my roll to see what the others do. Its the only way to combat ninja's unfortunately.