I mean, evil in D&D follows 3 general brands: follow the rules - even the ones that are oppressive, kill everyone/no regard for life, and rule through sheer might. There is no authority in the wilds where we are to appeal to. Not a legalistic one anyway. Goblins are operating under the latter one as well. The middle option gives no fucks so meh. Are you saying you want special treatment for being a drow?
I can see your point... potentially. On the other hand, what with the brandings and "true souls," there's no reason for them to heed you as you don't stand out as part of the ruling class. You're only a threat if you could report them to the drow lady in the encampment but she wouldn't give 2 shits either. Basically, there's very little reason for them to NOT try to murder you. They're already on a pillage/kill spree anyway.
So why -should- you be evil? Because you know what's best and will subjugate or kill anyone who thinks otherwise. So get on it!
