Are you too young to remember the Heysel tragedy? Rioting Liverpool fans in the stadium lead to the deaths of 30 supporters, mainly Italian and Juventus fans. This results in a ban on English clubs participating in European competitions for five years during which Southampton would have gone to the UEFA Cup. Everton can feel particularly aggrieved.
Liverpool think that they are above everybody else and every other club and that the league regulations on tapping-up don't apply to them.