http://www.perlmonks.org?node_id=289201

How about wrapping all signatures with something like:

<div class="pmsig-NNN"> ... sig goes here </div>

Where NNN is the node_id of the monk in questions home page.

That way I can use CSS to hide all signatures if I think they're a waste of space - or maybe just the ones that hurt my eyes and take up more space than the post - mentioning no names :-)