User blog comment:Rappy 4187/Technical Update: June 28, 2017/@comment-26148213-20170630162853/@comment-126761-20170630203055

Indeed, as mentioned - it's not intended as a moderation tool: it's an anti-spam and stability fix.

We do have the ability to tweak how strict it is, and we're happy to hear feedback on that, but it's not likely to be something that can be changed (or lifted) on a per-wiki basis.