Question on installing Win 8.1 RTM

Can I Torrent a copy of Win 8.1 RTM and do a fresh install on my surface pro?

Since it's not obtained through a legit channel will I be able to activate the copy using the surface pro key?

Will I be able to get updates and everything else as if I got it through windows store? Would this come back and haunt me in the future?

Thanks

...just can't wait another month for all the new features.