I think Cancun is like a house party. If you have too many guys, there's fights. My friends had zero issues down there, but again, we avoided Student City nights/ Student group nights. In the future, we'll go back to Cancun, but maybe a few weeks earlier.
The only real trouble I saw last both years I went was caused by other English guys I was so ashamed to come from the same country as them What sort of vibe was there this year then? Bye Adam