Le persone violente dovrebbero continuare ad essere autorizzate ad acquistare i biglietti

Good! This was an idiotic idea for three reasons:
1. Sensible private data should not be given to loads of private parties.
2. Banning ticket sales for problems which are exclusively happening outside of the stadiums are not productive and thus not proportionate.
3. We are a federal state and the cantons must govern in security aspects, if they want to do so. You cannot cry Kantönligeist and then ask for the federal government whenever a task is not so easy.