Thanks for the Rep bacanze, glad you enjoyed that one. I have to build a better trap, that Google bot escaped after 18 hours. When i do if Google doesn't meet my demands for his safe return, Ebay here i come... "Your chance to buy your very own pet Googlebot 99c start" lol But on a more serious note, yes you can block him from indexing non-content pages via robots.txt It's a good idea, having a million dup callendar etc pages indexed serves no real value. Personally, i'm waiting to do this until after the PR update and things "settle" as i want to implement a number of other changes at the same time such as purchasing vBSEO for it and doing a full URL rewrite amongst others.
I would limit what guest see.. Only allow guest to see the quality pages on your site, and thats all google will be able to index
May I suggest installed some search engine optimization mods.... Such as dynamic meta tags and SE friendly URLs...