DPS display could easily be solved with a system already in game.

[Welsper59]

Not true at all. The harassment is what the focus on when banning or whatever conciquence they deem necessary. The fact that you are parsing is irrelevant even in the current ToS.

Overly done, yeah, it's very easy to catch someone and take appropriate action against them as a GM. In those cases, often very particular words are used (e.g. racial slurs or threats of violence), and these make it easy to make a call. In the case of parsers however, saying "your dps is really low. get gud nub" followed by "im carrying this group cuz the other guy sucks" and so on, is not grounds to take action against alone, regardless of how annoying this person may be. The parsing tool has a lot to do with whether or not action is taken though, even if it may not be the primary personal reason you call a GM (you called because this guys an asshole), it may be the main reason a GM can easily take action if parsing is suspected.

An old interview you may or may not have seen (particularly important in this context is the last 30sec) :
https://youtu.be/3-WXYg-S05U?t=6m4s