We can't just jump to conclusions like this. We can't take a single story about a single bad editor and make blanket rules. You have to take a look at the whole dataset of people who make crusader efforts and then see if there's a pattern.

Even if there is, you then have to ask yourself if it's something that people will just learn and work-around.

I'm not disagreeing Cross was likely a net negative for wikipedia, but gut reactions to a single bad actor don't justify large theoretical changes to a largely-successful system.