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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I have a Gally. My name is HUMANOID TYPHUN and I will never shun a fellow Guardian that doesn't have one. "You don't have one? No problem BABY, I'll just launch two." A Guardian without a Gally is a Guardian that has to work harder than I. I salute those of you without one. You still fight the good fight. Good day to you.