Correct, but there have been more complaints and conflicts from people walking through the line after going to the bathroom to begin with (from non-DAS guests in SB queue). What I was saying is that Disney will have to put together some sort of system that allows people to re-enter lines safely, or else they actually run the risk of losing a legal challenge.
The major benefit they get from this is that people who theoretically might have an issue and need to leave the line will only do so when necessary, thus cutting way back on the number of people in the LL queue. However, they need to have a plan in place to deal with incidents as they arise (or better yet, preventing them). Simplistic solutions like "just ban them" doesn't help unless the behavior of all parties to a conflict is easily determined. And given that we've already had some brawl video incidents in recent years, Disney couldn't pretend they didn't know that guests trying to return to their spot in line wouldn't face additional risk. This all really depends on the implementation.