Surveys
 

I am getting more than a tad peed off that when going to a website, on occasions a survey pops up that says more or less "this site has been blocked until you complete this survey which will take 30 seconds to a minute to complete" - then you have free access for 24 hours! It has only happened about three times but once is enough!

Quite agree, I just fill it in in the most negative way I can and if there's a comment box tell them the site is rubbish.

Good idea - will do that.