User blog comment:Kirkburn/Technical Update: September 2, 2015/@comment-1757994-20150903225322/@comment-126761-20150903232652

The quick answer is: we want to start simple and expand from there. Some communities and other users use JS that's stored in the user namespace and this is generally not a great idea (what happens when that user leaves?). As we continue our review, we'll definitely be thinking about the best way to approach these issues.

We don't want to get in your way - but like we've mentioned in a few places, putting security first means being cautious.