I tried to inform ask.com and my colleague tried again. No reaction.
Seems like a bug in some shopping portal package, but it's still very weird.
From my quick looking around - it seems that Apache has "/server-status" as a module - so you could hit all domains via a bit and see if any have it turned on?
There is a pretty high concentration of searches for serial numbers.
In all seriousness, this is a disaster -- I'm sure there are already people scraping this page to grab this data.