Not really, you should read The Swarm, that fiddles around with that theme (ok not réally aliens) pretty nice.Ultrajoe said:No.
To make an alien race noble and good, they must conform to our standards of 'good' and 'noble', which means humanizing them to display very human aspects of honor and justice. By the same token, to make humans evil you need to de-humanize them.
Hence, any attempt to pit bad humans against good aliens just equates to 'Odd looking humans fight very human looking aliens'. We've had it, it sucked balls. Convention is convention for a reason.
Good idea though, but one that is by it's nature self-contradictory.
Anyway, Warhammer 40k is a pretty good example of evil humans (although they portray themselfs as good, obviously).