Ow_base_tag :
It appears i didnt delete all tags, but i now i have .. there were over 250 tags, only 4 were mine.
now they are gone. this spam thing is so weird. Get something to stop allowing to join site.
Yes remember that user data is spread out over numerious tables so just deleting from user table will not do it all. This is why we recommend that you delete them using the admin panel or the admin menu when you view their profile. That way they are deleted and so is all their data.
Change your site in admin privacy and permissions, select the box that says manditory user approve. You will need to approve each user. There are also plugins free and paid that you can add to help you in the Oxwall Store (on the menu above)