IMHO: The vast majority of the folks we're talking about are your average, everyday, businessmen, who seldom ever travel by air, that stuck a .38 spl in their briefcase 2+ years ago, and forgot the durn thing was in there when they packed for the flight to the National Trade Show that they attend every few years. They grabbed said briefcase, in a hurry, on the way out the door, as they headed to the airport, and "OOPS, I FORGOT I left that gun in there."
These are folks who had a brainfart whilst in a HUGE hurry to get to the airport, 3 hours early, so the TSA could feel them up, and harrass them, before being allowed to board a plane. They are certainly not the sharpest knives in the drawer. But, if they have a carry permit, it's not like they're convicted fellons, or likely to try to hijack the plane. For that matter, they probably could have, possibly would have, packed it in their suitcase and checked it as baggage, if they had thought about it, and wanted to take it with them. I knew one of these guys who did this once. EXACT scenario I just described above. Sold me ALL his guns after it happened, so he would never have to worry about it happening to him again. Definitely not overly brilliant, but certainly NOT a person who would have ever harmed anyone, even if he probably should have!!! Not the sort that needed to be carrying anyway......
Do they deserve a felony rap, as well as MAJOR fines and hassles? I'm thinking NOT! Do they deserve some sort of minor wake up call? Probably so. But it's a pretty safe bet that 99.9% of these folks had zero malicious intent, and I was under the impression that intent had something to do with your guilt in criminal matters.
But then what do I know? I am not of the ruling class, I am but one of the ruled.