For example, at any duel between Ajax and Feyenoord the away fans have been banned - since 2009. The Den Haag municipality banned away fans at ADO Den Haag - Ajax games for over 10 years. NAC - Willen II didn't allow away fans during the 2022 season. Fans misbehaved badly enough during N.E.C. - Vitesse games that they were threatened with a 10-year ban on away fans. Amsterdam banned the Italian fans at Ajax - SS Lazio in 2024, due to repeated antisemitism and racism. Lille didn't allow Ajax fans during their game last January. In 2023 the Amsterdam police seriously considered banning all away fans during all high-risk European games.
And that's just the first few results of a trivial search for a single country. I could probably find a hundred more without much effort.
For example, at any duel between Ajax and Feyenoord the away fans have been banned - since 2009. The Den Haag municipality banned away fans at ADO Den Haag - Ajax games for over 10 years. NAC - Willen II didn't allow away fans during the 2022 season. Fans misbehaved badly enough during N.E.C. - Vitesse games that they were threatened with a 10-year ban on away fans. Amsterdam banned the Italian fans at Ajax - SS Lazio in 2024, due to repeated antisemitism and racism. Lille didn't allow Ajax fans during their game last January. In 2023 the Amsterdam police seriously considered banning all away fans during all high-risk European games.
And that's just the first few results of a trivial search for a single country. I could probably find a hundred more without much effort.