The difficulty in identifying troublemakers in the event of any crowd trouble?
Police could look at known troublemakers signing in at their local police station during the Leeds v Hull game.
Will the online rogues gallery launched by pubs in South Shields deter troublemakers?
The atmosphere remains friendly as the door staff keep troublemakers well away.
Officers will monitor queues into town bars and night clubs and work with door staff to exclude any troublemakers liable to cause problems.