So I'm seeing a new trend in Wiki spam - this kind of stuff has been hitting the VW Wiki at UIUC lately:

 

<center>
<u style="display: none">
"Bozo spam hrefs go here"
</u>
</center>

Even worse is the crap like this:

 

"bunch of keywords here"
<p>
<meta http-equiv=refresh
content="0;url="url to redirect to here"<p>

You see the keywords for a second, and then get immediately redirected. Truly, truly ugly stuff. I have filters for this kind of stuff for our Wiki, but all I can do about the UIUC one is run repair scripts that use HTTP to revert.