Have talked to fans from various clubs, who felt intimidated at Maine Road.
Think the location was a tough, working-class area with a lot of pubs that weren't necessarily welcoming to away fans.
Apart from one or two remaining pubs, the Ethiad Stadium is in a soulless, vacuum.
The open-plan lay out around the ground stops most idiots (from both sets of fans) from playing up. Having cameras everywhere has stopped a lot of aggression.
Unfortunately, the FA Cup often attracts "gloryhunters for the day", who can be far more aggressive than the regular fans.
If City get a huge away allocation in the next round, some scoundrels could get tickets and may play up ?