To facilitate administration, everyone is invited to list users that post spam or otherwise vandalize the wiki in the format of:
This results in a link where all contributions of that nick can be easily accessed:
As it is clear that this is only a temporary solution, confer to the (not so) current discussion in the forums for a long-term solution that is still to be found.
Blocked spam accounts should be deleted from time to time to keep everything neat.
Two not so old
And two older
I have found a couple more, but I don't know if it makes sense to block them (they are from 5 years ago). Are you happy to see such ... diligence or should I seriously give myself a break?
A list of blocked IP addresses and usernames can be accessed under Special:Ipblocklist.