A delicate subject as evil is "supposed" to use underhanded and unfair methods as anything goes, really. There is a very fine line what is unfair and what is not and even if it is unfair, is it okay or not.
I think the most important thing is to keep your emotions in check and try to cool down. The player behind the other character goes through very similar stuff you do as well. Try to remember that.
This said, most evil characters have constantly deal with multiple assaults from every direction as the moment you declare your intentions, the word gets around and people. Ome a-buzzing around the vicinity of your evil intentions. Those people easily include a tshahark, a priest and perhaps a mage and an archer among other things. So being solo at that point can kinda suck if you have the "wrong" attitude.
Forgetting player placed traps, death traps and whatnots, you can easily log in only to be pummeled down by a horde of npc dark elves. This has happened
While there is little you can do against rotten luck, what you can do is prepare yourself against the one you have offended. Especially if you know that one can place dead meat with killing intent on your door step it might be prudent to look before you leap. There are many, many tools even for the "mundane and common" character to use.
Personally I like the undead and the fact that they are used most deviously. We cannot just assume the priests responsible are always conveniently there for us to maim and kill after we have prepared our best attacks. There was atleast a theoretical chance for escape in this particular instance what I understood of it.
My grievance is with exits that cannot be used in combat at all or which completely block scouting and lead into places such as the death valley slope. It is alright for things to be unfair as hell if you only FEEL that you have a chance. No matter how small. Not feeling that can kinda suck.
As for the teaming bit Zehren mentioned, I would have to agree there.
All IMHO and all that.