There are other (maybe a bit more complex) ways to tell what browser you're using, and whether you block ads.
> I've never seen a quality site that tried to block me for using an adblock
...yet. This is starting to change, and a lot of websites still have ads as their main source of revenue. Either that, or subscriptions, and the latter (for online newspapers, for example) is taking off very slowly.
Again, our usage patterns are in the minority, so whatever tough choices we might want to make are not necessarily to everyone's benefit right now.
At least in theory, I support the Better Ads initiative by Adblock Plus. Even though I've mostly been using uBlock Origin lately...