NB - I'm not getting all defencive
Now for the part you are probably not going to like. The fact that your friend went there and stated 'hahahaha' means he went on line to find effects that you do so you will not be able to 'put one over on him' this is indicitive of your performance. Judging from your post you are challenging your friends rather then entertaining them. I haven't seen your performance so I could be wrong. I'm just pointing out a possibility so don't go getting all defensive, or get defensive, no skin off my nose. Just something to think about. Other thing you can do is stop performing for your friend, eventually they will forget about it. The other obvious thing is stop pointing the site out to others...
I'm taking this as constructive critisism, the way I perform effects to my friends (or this certain friend) may indeed come across as 'I can do this and you can't' however, I would say that its him being one of those people who cant take not knowing how a trick is done, rather than the way I do the tricks.
For example, if I show him a trick, he HAS to know the name, (I dont tell him, as I am 100% certain that he will search for it on youtube, then claim that he can do the trick too...) - this drives him mad, but he always seemed like a good sport with the whole magic thing, and often gives me friendly advice on how to beter the trick and the performance, but now he just says things like 'I know how you did it' or 'mr_expose_magic, on youtube does it better than you'.
I know there isnt much that can be done about these sites, and I agree with other users comments - there are other sites, people can rent books from a library, buy from magic shops etc, however, the 'under 20 youtube generation' seem to be spoiling things for me (as a magician showing my friends a few new tricks) as they can simply search youtube and bam, trick exposed and potentially ruined.
Final thing (honest
), didnt even occur to me that posting the link to the site would be essentially advertising it :S - the ultimate hypocracy :-O
Dan