Removing the signature requirement was discussed in T55132: Notifications are not sent when a user mentions another if the signature of the sender contains localized namespaces.
I believe that aspect stalled, because of these concerns:
(In reply to Quiddity from T55132#577605)
(In reply to comment 16)
My recommendation would be that we remove the requirement that a signature be
included before a mention notification is sent, as stated here:
Regarding "remove the requirement that a signature be included before a
mention notification is sent", which I'm generally in favour of...
I just saw Bug 54639 ("Echo is not triggering notifications when a mention
is made while reorganizing comments in the page") which makes me worry that
(if the signature-requirement is taken away) mass notifications will be
accidentally sent when threads are shuffled/split/merged or archived.
Just worrying out-loud; I might have understood the details incorrectly.
(In reply to Bartosz Dziewoński from T55132#577614)
Good point. Luckily I think we could easily avoid that issue by just
counting the number of mentions for each user in the old and new wikitext
and only sending a notification is the number increased.
(In reply to Wikifram@gmail.com (Account disabled) from T55132#577622)
A) I would support the removal of the need to sign a comment before a "ping"
works (I wasn't aware of this requirement, and thought that my "ping"
remained unanswered until JdForrester nicely explained this to me)
B) I have the habit to archive my talk page by using "copy-paste", I
wouldn't want people to get unwanted notifications when I do this though.
I fear that A and B are mutually exclusive requirements...
Copying here, for easier access, and further/later investigation.