1. There is no one at Wikidot who reads this… and perhaps to react.

2. It is not a good idea to spread this knowledge over the world to let all spammer know they can use Wikidot for their spam - free..

3.You should change your permissions in your _admin page to a "closed" Wiki and only available for members and known partners ( no anonymous anymore)

You have the authority and responsibility to stop these spammers from your wiki.

I have it not

There is no one at Wikidot to hear your wishes and react.