Any Manchester United or Liverpool supporters caught unfurling obscene banners this weekend face potential jail.
The pair's last meeting at Old Trafford - a Europa League quarter-final in March - was blighted by abhorrent chanting and fighting.
That came after a Hillsborough banner, reading 'murderers' alongside the date of the tragedy, was draped over a motorway bridge.
It was in full view of travelling fans driving through Salford on the way to Old Trafford, with two men ordered to serve community service for posting the pictures online.