Here's my completed list, taken from your suggestions here and my own
fevered imagination...
Top 10 signs you've over-modified your scanning receiver...
1.  Houston Mission Control drowns out the local repeaters.
2.  Your radios glow in the dark.  Even when unplugged...
3.  The NSA calls to get copies of transmissions they missed.
4.  Commercial airline pilots use your antenna array as a landmark.
5.  Your wife says "Either that thing goes or I go.  Over."
6.  Your rooftop, car trunk, and backyard are collectively referred to
    as the "antenna farm".
7.  SETI calls you to confirm signals from Orion.
8.  You dial in frequencies that Stephen Hawking says don't exist this
    side of a black hole.
9.  You hear voices talking about invading the "third planet from the
    star".
10. Your "Low Battery" indicator glows constantly, even when you're
    operating off AC.
Thanks to Joe Nicholson (Fidonet 1:202/911), Charles Hunter (Fidonet
1:273/408), Al Stern (Fidonet 1:374/710), Bruce LeGrande -
ck1@pacbell.net (Fidonet 1:2003/5) and anybody else I missed.
If you have web access, look up this list (and lots of other fun/weird stuff) 
at http://www.wingnet.net/~catfish 
... Tonight's mud wrestling event:  MENSA vs. Hee-Haw
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