I start my activity on these pages by pointing to a security problem we have here. I found it when viewing one of my comments to a news article where a new comment appeared:
I thus wrote there this, which indeed is unfortunately true:
The comment by Tiffany is a spam. It only says "Nice" but points to some shop with cheap bracelets. Tiffany should be removed and then one can remove also this comment.

I would think that it should not be possible to insert a link into the signature.

This is opening this site to miscreants
who could link us to phishing sites. This should be fixed!

My warning appears as
and it should really be fixed. If people want to link to their pages, they must have account here.