Would it be possible to get some sort of HUD message that Nemesis minions are in the area, it's no fun doing missions never dropping out of combat because I was too far above ground for my nemesis minions to hit me, but they are still on their way (and usually stuck). I love trouncing those guys and would stop to fight them if I only knew they were about.

or some kind of warning for everyone else that those three ninjas by the arcade cabnet are level 36 in an aread filled with level 10 enemys, and will obliterate you if you approach.

They actually already have a warning, it's just far too easy to miss.

When they spawn, they will shout out something along the lines of "-Nemesis name- wants you dead!" or "-Nemesis name- knew you'd come here!". The problem is that these easily get lost in the list of other chatter going on, and unless you have your NPC chat turned on or you're watching your NPC chat channel (which I do when trying to find my nemesis minions), you're likely to miss it.