I'd never leave early as it means you can't boo them off at the end.
Neither is a crime as I don't believe you are likely to be arrested.
leaving early and yes i include standing on the running track is the biggest crime any football fan could commit.
I have stood my ground in the face of a home defeat AND portsmouth scum in the north stand... neither was a good enouth reason to go early.. but i would never boo the albion off either( and i was there for the palarse 5-0 and cheered the albion off)
Why on earth did you cheer them off at Selhurst?
i booed and left early, first time ive ever left a match early too, the only other time i booed before was the 2-1 defeat at forest few years ago