Can you imagine popping into your local bakery to pick up a baguette and after learning that they have sold out you find your exit blocked by a couple of bouncers who refuse to let you leave the shop without making a purchase?
It’s not going to happen.
So why on earth do some websites think that adding a bit of JavaScript to their homepage to prevent you from using your browser’s back button to leave their site is a good idea?
Hell has more chance of freezing over before I will ever intentionally re-visit a website that deliberately thinks that this is a legitimate way to encourage visitors to spend more time with them.
Riding the ripple 
Couldn’t agree more. I’ve never really understood the legit sites that do this. It’s one thing to expect it from a spammy site, but not from [previously] respected brands.
I did think about publishing a list of the worst offenders but found myself so irritated by the experience after checking the links I didn’t want to impose it on anyone.
Changed my mind! Can’t believe Argos do it. Very disappointed. http://www.argos.co.uk