I am not really interested in the services offered by that site, but we shouldn't be shy about having drug dealers and escorts using bitcoin because it shows the value of the currency if they are willing to go out of their way to learn to use it.
I would go so far as to say that if the Euro or USD couldn't buy things on the grey and blackmarket I would be tempted to start calling those units of value coupon credits or gift cards rather than true currency. A currency needs to be fungible and allow the end user the ability to make decisions and contract as they wish.
There is more than just escourts!!
I am going to start using it to buy more stuff from as they now accept BTC.
I put an add up too!! Just to teach ppl how to use btc though.