My favorite is the Pro-92 and the fact that it's default when powered up was *not* to scan but to sit there on the first unlocked channel. Most of use set Channel 0 to a noise maker with the alpha tag set to "Press SCAN", so we'd remember to start the scanner actually scanning.
Even though I got rid of the 92 years ago, to this very day that irritates me no end as *the* stupidest scanner "feature" ever.
Second place for me are the scanners that have SAME decoding in WX mode, but to use it means you can't actually use your scanner as a scanner, but just a very expensive weather radio. The Fire Tone-Out feature mentioned by Portable14 is a continuation of that foolishness. I mean, *so close*, and yet so far...
Brad.