Railway and train modellers, of all scales. To their credit, a fair fee people are becoming more open, but especially modelling clubs are often run by old white men with questionable politics and problematic behaviours. They will sneer at anything that's not steam, or at people who run modern instead of vintage trains, or who don't get a train model exactly right the way the original ran that one time in the mid 50s from Bumfuck, Idaho to the middle of nowhere. They have little patience for newbies who might not have internalised all the lingo, or who might need something explained in simple English. If you build something that is not an exact replica of a real world location, they'll say you're not doing model railway, but merely toy trains. And then these same people go and wonder why they can't attract new people to the hobby.