Blocking sites won't be a solution for everyone.
There is an easier solution that will just take under 10 seconds, and you won't be able to play with those bitcoins. Yes, send them all to me

btw, would anyone be interested in an escrow that just holds the funds for a fixed period and then releases it?
What if the escrow decides to bail with the gathered coins and steal everything? There is no such thing as trusted people over the internet please.