I dont see a problem with mark djing at slinky, i think its a good step to bring the people that like that side of the music scene into the right place. It opens windows to people that they thought were never there. I mean i was the same. I used to only go dance academy when the tidy boys were there when all i knew about was hard house. And one night we all went to a night when mzone was playing, that changed me forever!
So i think this is a very good idea.
The only thing i dont like is the people that go out an dont really care about the music, there not bothered wether its lee haslam or chris lib. And even though these people may be really cool people, and i dont have anything against them, they can spoil the underground feel that i love.