From an UI perspective I really hate the ads in angry birds on android: the advertised products are never interesting and the ad is placed in a way that it can be accidentally tapped during gameplay (happened to me multiple times).
I would GLADLY pay to get the ads to go away. Maybe they should add a premium, ad-free, version
And as lots of people have already pointed out, an ad-free version would be pirated instantly. This way they make some money out of the Android user base.
Personally I suspect that once the hive mind gets to work even ads will stop working and Android will simply not have any commercial-grade software whatsoever.
I would GLADLY pay to get the ads to go away. Maybe they should add a premium, ad-free, version