False visitors

I have just lunch my discussion for three days and I have 300 visitors into it. This are false visitors, boots trying to spam my network. They can't because I use nocaphta on registration form, but now I have posts with more then 300 views and this is false... I don't want that to happen. How to stop it from viewing my posts?

They found my site because of the phrase "Powered by EasyDiscuss for Joomla!". So all your clients that use that version will have this "guys" on them trying to spam. That's not good.

So my question is: Why not use the phrase "Powered by EasyDiscuss for Joomla!" inside an image and not as text? Wouln't this protect your clients from being spam?

Thanks