This is not a good argument, please go back to the drawing board.
You are making the extraordinary claim, so you are the one that needs to provide evidence.
No browser vendor has blocked any sites in the way you are describing. Not Firefox, Chrome, Safari, or IE. At best, you'll get a warning when you are about to hit a malware site, but that's about it. You can click right past it.
So no, what you are saying is ridiculous, and you should really feel uniformed and silly for suggesting it was likely.
> No browser vendor has blocked any sites in the way you are describing.
Chrome and Safari both use Google's "Safe Browsing Database" which outright blocks phishing scam sites. How long until this is expanded to "hate sites" because they "aren't safe"?