The entire topic strike me as vaguely funny, really. It illustrates a difference of approach between me and the guys I used to game with as a teenager, and apparently everyone else.
For us, 10' poles weren't for finding traps. There were other tools for that purpose. We thought of 10' poles as items of equipment used to prop something up (and hope it's dropping strength/weight wasn't greater than the structural integrity of the pole), tools to reach something you either couldn't or didn't want to approach too closely to, and first and foremore for crossing pits.
It still shocks me that most everyone seems to immediately think "Cast Fly, duh" when presented with a pit that is too large to jump. I never had that happen when I was younger. We used the 10' pole as a balance beam. (which is why I started carrying 10.5' poles. Obnoxious DMs would present you with a 10' 1" wide pit or somesuch, just to get that look on your face when your 10' pole was JUST too short, and fell into the pit, because you'd come to assume a pit was 10' wide)