Hi Edward.
Damn does bots.
Thanks for taking care!
1)
I have increased the security, so you need to have link-click confirmed your email,
before you can edit.
2)
I have also made it necessary to do CAPTCHA input, before each submission of
a page edit.
3)
I installed a Merge and delete users extension for admins.
I have created a user: Spam bot
And merged and deleted all dubious users into that user user.
(Note, total deletion on wiki's is "normally" not possible).
I hope this helps a little.
I am stunned, that the bots can be created at all. ?
You need to pass CAPTCHA, to be able to create a user. ?