[Absalom]

From what I can tell you seem to have ok gear though I have a couple suggestions. First, if you aren't focusing on destruction, i'd probably replace the spell crit with spell hit or damage. Your hit rating is fairly low for raiding (per threads I've read all over these forums on this very topic) so I would likely work on that first. I see you have imp shadow bolt, however, with your hit rating lower as well as the crit rating.. you will likely not be getting the damage you are looking for provided the spell isnt resisted in the first place. You could try moving the points from imp shadow bolt to suppression in the affliction tree (this wont help for the shadow bolt but will help on your other dots).

As for rogues in PvP.. what pet (minion for those that want to be picky) do you have out? I run with the felhunter in BG's so that I can not only get a jump on rogues but so that I can counterspell/silence (spell lock) casters. Your felhunter will help you find the rogue before he finds you. When going into a BG, have a trinket on you (which you can get for honor marks) that can help you get out of movement impairing effects. Also, there are addons that might help you out with the rogue as it will be more apparent when they use things like kidney shot, cheap shot, or cloak of shadows. This way.. you can time when to strike back (i.e. know when the effects of the ability will wear off and when you will have a chance to do anything). If you see cloak of shadows come up.. dont bother with casting as you are just waisting mana and adding to the rogue's enjoyment.

These are just some suggestions. Others will likely have similar or completely different ideas. I wouldn't throw in the towel. Just take some time and go back to your studies. Watch what other locks (check their armory page if you want to see talent or gear setup) are doing in raids or BG's and if needed, make adjustments to your own game.

/salute.