I don't actually think that Buzz is bad ... unless you're following some weirdo who talks about drugs, sex, alcohol, etc. But as long as you limit only Buzz Followers to seeing your page, all is good. People can post anything they want, but unless you type in a random name and they have something innapropriate on their Buzz, it's not really Google's fault. Actually, I've never noticed any ads. Buzz is just used for updates, like a Facebook wall.