In the pre-Tim days, I'd actually report these people occasionally, just to stick a thorn in the side of the then-stone-silent Management beast. (Imagine being the mod on duty to address any problem children, only to have your own name pop up.) Of course, I'd usually earn a week-long ban for this, but somehow I usually did it just before going on a week-long road trip; go figure.
Anyway, now that there's a chance of actually addressing the problem:
It sends the wrong message to people to tell them to follow one set of rules, while personally ignoring them. There's actually no upside to doing this, and besides spreading ill will, (perhaps subconsciously), it could potentially confuse those who do pay attention, but don't realize that some accounts are "special".
Thus, may I respectfully suggest that all mods/admins please be limited to a single 234x60 graphic, two lines of text, (or whatever the limit is this week), of a single font and color, and any other signature rule that I'm forgetting at the moment. Again, I'm not here to name names, but this really shouldn't be too difficult to implement, and possibly even enforce. I'm betting that less than a half dozen "special" accounts are currently non-compliant.