"Are there many other cards people would consider inappropriate to play in an lcg game? Fetch Stick & Sharp Shooter are on my watch list (though the later seems no more greivous than Prize Pistols)."
Personally, I think there are a lot of them. I can't give you any sort of full list as I wasn't around in those days, but for instance the CCG had a lot more cost reducers which I would consider inappropriate.
Anyway, here's my take… The CCG-era cards are not legal in the LCG. Your buddies are letting you play them anyway, they're doing you a favor. In that light, I would go along with whatever they feel is over the top. But, I would also insist on some structure - keep a written list or something and only add new cards at the end of a full night so you're not stuck re-making decks during what's supposed to be gaming time. Hopefully they will agree to this as a reasonable request. Offering to let them use your CCG-era cards too would also be helpful as a goodwill gesture. It can't be overpowered if anyone can use it, right?
Over time, hopefully the problem will shrink as your LCG collection ramps up.