If you own a Gally only play with other Gally owners. That way all the people who wanted the nerf but at the same time always want your help can't get it.
Edit 1: In my experiences most of the people starting groups saying you must have a ghorn are looking for help not elitist. It's people who can't play the game asking for the help of the almighty rocket launcher that have caused the problem so let them do it on their own.
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You do realize that this is exactly what the community is going to do. The LFG forums will be blown apart with Gally only posts. I'm actually happy cause this is exactly what Bungle was trying to fix in the first place and now it I'll be 100x's worst lol