Because an innocent person can be bankrupted by repeatedly having to respond to frivolous lawsuits.
Courts and judges aren’t something to be truffled with.
https://dailyillini.com/news-stories/2013/04/26/suburban-exp...
He would intentionally file lawsuits in another county because he knew it's too much of a burden for many students to travel there for court hearings. Students just settle even if they think they're completely innocent.