[Mediawiki-l] Signing text automatically in discussion page

[Tech Geek]

Hello MW users,

I have been trying to achieve the following for quite some time but not sure
what would be the best way to do it.

I am using MediaWiki 1.12 on Debian 5.0 Linux.

I know of two ways by which users can add their signature after adding a
comment to the discussion page on any wiki article.

1. Type "~~~~" (four tildes) at the end of the comment.

2. There is a "Insert Signature" button in the editing toolbar by which a
person can include the signature.

So my question is:
In both the above cases, one has to remember to add the signature. Is there
any way by which the signature gets added automatically whenever a user adds
a comment to the discussion page?

I tried checking the extension matrix before posting but nothing came up
related to signatures.
http://www.mediawiki.org/wiki/User:A.../AllExtensions<http://www.mediawiki.org/wiki/User:Alterego/ExtensionMatrix/AllExtensions>

Any ideas?