They were complain about out of staters when I was there too (ignoring that out of staters pay like 3 times as much to go there) but as a Pennsylvanian I stayed put of that argument. The weird mix was always a thing there, with pep band when we played at basketball and hockey games we'd have Shipping Up to Boston and Sweet Caroline, but also Empire State of Mind.Vermont has a lot of Red Sox fans (which bleeds over Lake Champlain into northeastern New York weirdly enough) but you have some Yankees fans who are contrarian assholes. You have New York transplant assholes and New Yorkers who go to UVM. There's actually a mild controversy now in Vermont because UVM has such a high out of state percentage. People are complaining about UVM "not serving Vermonters."
The Burlington media market goes into New York, Vermont, and New Hampshire. When I was a kid in New Hampshire, we got New York campaign ads, which was weird as ****. It carries New England sports fandom to northeast New York at least. I can't remember if the Yankees were covered as a "local" team by the nightly news but I know the Sox were.