I find it's not true that this generation know about computers – they know about Halo and Facebook and that's it.
Nah, you just have non-computery kids, gamer types. Any kid with half an ounce of noddle these days could google the way to do it in ten seconds flat, never requiring to tell their mother anything and leaving their father assuming they were now porn free as cougar says!
another thing they seem to know is how to watch hard core porn on their mobiles when they are 14. I'm not convinced it's a good thing.
We "found" it before the internet or mobile phones existed, at the age of about 12-13. Surely better to just point out what's acceptable and what's not rather than make it a tabboo that they'll do behind your back? Removing browsers just strikes me as a poor way of doing it, easily reversed and bypasses the bit where you explain why some things are not acceptable, whats natural and what's not etc. What do I know, I'm not a parent, but that's how I'd deal with my kids.