Some of these tools are already in place and and can be used for finding the secretive "ultra-lurk Troll". If you are in a thread and click on the alledged Troll's screenID. The next page is a member's home page which shows their "Born on Date" in the upper left-hand corner under the screenID. For most Troll cases, the Born on Date is the date of the offensive thread and this indicate a drive-by Trolling. Notify your local AdminModerator and The Cult of the Viking Kitties for the ZOT! party.
Below the Born on Date is a button called In Forum. If you click on that, the next page will list all their recent postings. If there's only one (the suspect thread), there's a chance the screenID member is Trollkind. These decisions maybe left up to the more skilled Troll-detectors...