DGolds, I once told the customs guy "20 minutes". That freaked him out.
Here is another reason to tell the Ticket Police...
I wanted to fly ELP-LBB (changes in IAH) round trip. The fare was $433. I instead booked ELP-IAH-DAL-IAH-LBB-IAH-ELP. Got 2 extra segments and...
the fare was less!. It fared at $370. The lady knew something was up because I was only in DAL for 25 minutes. I politely told her if she would let me fly the shorter route FOR THE LOWER COST... i'd be happy to!