urm...they didnt actually lay into anyone. That was hyped up media garbage.
They were 4 young lads having a drink ( albeit a loud one) at a hotel near the airport and there happened to be Americans in the area where they were waiting for flights...because the airport was closed due to 9/11.
They were fined 2 weeks wages by the club not for abusing anyone but for bringing the club into disrepute by allegedly being drunk in public because the game against a European team had been called off and they were stuck at the hotel
http://news.bbc.co.uk/sport1/hi/football/eng_prem/1558855.stm