Alright, gonna put my whole opinion here, from an artist's point of view, here it is:
To be honest, if I found someone uploading my tracks without sending me a pm or anything, without my permission, without a link to my channel, or worst of all, without the proper track name, I would be pretty fucking pissed. I usually keep all my music to my own channel, because this way, I don't have the same song on 10 channels, meaning I would have 50 views on each rather than 500 on one. When you upload tracks that belong to someone else, how is the listener going to find their channel without either you linking it, or having to search like hell for an entire day? And think of all the new fans they miss out on. You're hogging their fame. When you upload their track along with other artists' tracks, they think, "oh well, that was nice. Now to go on to the next one." rather than thinking that artist is great and spreading all their music by sending it to friends, etc. I have one track uploaded to two other channels, and both of them have links to my channel and my Follow-The-Sound artist page, so this way if people are interested they don't have to search for my channel.
Anyways, my point is that you should really be asking first and giving proper credit to the artists.
One more thing to add, is why would you do this anyway? There's already a SERIOUS channel for dubstep, UKF. Basically, all you're doing is uploading your media player's contents.