This would be a fun idea...How bout the ability to personalize units that could be seen by allys as well as enemies for some some good comedic relief?
Simply select the unit and building and use a simple command like like:
.name "trogdor"
It could either list the name as a tooltip (where it says 'enemy unit' it could just add in brackets or something the name) - this would probably be easiest - or it could some how artistically "brand" the unit or building with letters that could be seen by zooming in. The first method would probably be much easier.
I mean, being raped by a krogoth is one thing, but if that krogoth is literally named Trogdor it can really put things in perspective. =]