I'm positive there are thousands of people banned from Disney parks for good reason - how else can Disney enforce those bans at their scale (150 million visitors per year)?
I'm finding it hard to be empathetic towards an ultra large business with that many customers trying to enforce bans. Also, I find it difficult to support the bans. (Given the number of customers they have, they're probably overly lenient on banning)
People have been banned from disney for stealing in the park, fighting in the park, molesting or assaulting employees in the park. It's better for everyone to keep those people out