In the recent past, UEFA has come down hard on teams for a lot less than was witnessed during and after the Europa League last 16 match between the bitterest rivals in the English game. Both club's cases will be heard on May 19 by UEFA's disciplinary board.
Of course, it would be hard to search all the fans on a matchday. However, something has to be done and more stringent security measures put in place, especially with the away supporters.
Everybody is so wise after a terrible event so why not preempt it as it's better to be safe than sorry.
Thanks for reading.