re: Is it safe to go to the Alabama game by myself?

You will 100% be told to sit your arse down and/or have shite thrown at you if you cheer a key play in the game. Nothing much else other than maybe some empty threats leaving the stadium if LSU wins. Just ignore it and don't try to talk to them or reason with an angry person and you'll be fine.

Pretty standard stuff for a big game between two big teams.