Per en:WP:SIGRANT.
Topic on Talk:New requirements for user signatures
I wish.
I disagree. Computers work for humans, not the other way around, and I enjoy the diversity of user signatures on ENWP which already has several guidelines in place at https://en.wikipedia.org/wiki/Wikipedia:Signatures.
On the other hand, ‘diversity of user signatures’ makes our wikis less welcoming to people with colour blindness and disabilities that require using a screen reader to edit (since, I imagine, they have to go through a lot of useless code to know, say, who to ping in a discussion). You have to wonder what kind of diversity we should value.
Four years ago I wrote a script that removes most of signature clutter it can detect (only possible to use in Russian wikis, but I can probably fix it), so obviously I concur.
Imagine that a postal service started demanding we sign our letters in a particular way. Don't be so restrictive. It is unnecessary and condescending to volunteers
No imagination needed: Emails sent via Wikipedia are text-only