Those bastards... and they force you to sign in for their email and g+ and picasa and.. oh, wait.
Maybe I'll sound like a wierdo, but you can always opt out of using google at all and block them with ghostery or hosts. Problem solved. Let's be honest with ourselves and admit that data is the currency we pay for 'free' online services, and if we don't like the service or the 'price', we can just stop using it.
It's funny OP uses gmail and g+ but is worried about profiling for ad personalization. Btw there is google analytics on his blog.