I THINK THAT WE NEED TO BAN ALL THOOSE GREY FREE EATERS !

I am sorry that you have been having bad experiences with the grey guest users. I do not know exactly what they have done in your room, but banning all the greys isn't necessarily helpful, either to you or the site. From what I've heard, banning too many people from your room in a given time may result in penalties (not sure if it's true or not).
Unfortunately, while some greys are polite and respectful and probably a lot of them don't say anything at all, there are some who follow the examples of the "robots" that post into the different rooms which only guest users can see (once a member registers, they don't see these 'bots anymore), and these robot users are all about making demands and comments...not a good example to follow, really.
If you want to see what these robots are saying, try going into a model's room (or even your own room) as a guest user. This will show you what the greys see. And because the robots are colored as guest, regular and VIP members, it's difficult for grey users to tell who's real and who's not.
If you feel the need to ban grey users, perhaps you can try blocking their chat instead. I think this will allow them to see into your room without participating in the chat. You won't have to deal with their comments, they get a better feel for the site, and they may register and return to your room as a paying member.
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