Thread:Project:Support desk/How i can delete User?/reply (6)

If you have a list of known good accounts, you can use Extension:BlockandNuke and Extension:UserMerge to merge spam accounts into the user Spammer. BlockandNuke will also ban the IP addresses from editing.

I've been using this on my personal spam-bait wiki and have blocked over 10,000 IP addresses in the last month.