Is it common for college students to dress up in Halloween?

Sure. People tend to just do whatever they want... There were guys dressed as Cupid in the snow on Valentine's Day giving people valentines at my university...

Yes. I live near a university and have seen people roaming around in costume for over a week now.

in nyc, theres a parade where everyone gets halloweened up.

Party or other Legit Excuse required

yes

Idk