Here is the guide line on breaking rules and relevant punishment from most serious to least serve punishment.
Booing anthem or being critical of uefa family= £100,000 fine and we won't open the door for you if coming the other way into room
Not giving uefa officials butter with their roll for pre-match meal=£80,000 fine and excluded from secret Santa for 2 years.
Allowing wild animals (who are not a recognised affiliated uefa wild animal) to enter the stadium without a ticket or lanyard= £60,000 fine and have Micheal Owen do the commentary for all your games for 1 season.
Criticism of match officials = £40,000 fine and guaranted place in Europa league for the next 10 years.
Entering the field of play a few seconds later=£20,000 fine and all uefa officials can leave numbers 2 on the toilet unflushed for 3 games.
Any fans being racist or show threatening behaviour to opposition teams fans or players= A fine of whatever spare change you have in your wallet and a 10 pence mix up for all board members (but no sherbet flying saucers).
So don't think they will get a ban. However have you ever tried getting a decent 10p mix-up without having to purchase a the flying saucer. Can imagine the people of liverpool are going to be up in arms and planning vigils already.