I've had some bitter experience with this, both as a DM and a player.
I have some advice, since you asked:
Treat your party as if it were a 'regular' party of characters, in every sense but one:
LAY DOWN THE LAW that the party members MUST behave as good characters would, towards each other, regardless of their alignment.
In all other respects, run a normal campaign. Have NPCs react appropriately, of course, to PC attacks on shops, villagers, towns, and cities.
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If you do not lay down the law concerning how your players can treat each other, be prepared for:
1: Intraparty suspicion and hostility, followed by:
2: Intraparty backstabbing, followed by:
3: Intraparty fighting and killing, followed by:
4: The players having a fist fight, followed by:
5: The break up of the gaming group.
I should know. I've DMed that table. I foolishly believed my players could handle evil characters, and laid no restrictions on them. One thing led to another, and steps 1 through 5 went as described above.
As for playing evils, I have done that: I never attacked others in the party, knowing better. But they did attack my character, almost invariably, and killed that character. There is only one exception to this rule, and said exception is only a partial exception.
What works in Paranoia, does not work in D&D.
Edena_of_Neith