I was bored at the airport and reading the back of my e-ticket, which informed me that I was not allowed to carry spare li-ion batteries for any electronic equipment (didn't specify carry-on or checked baggage) - but for the first time going through security, I had the piss taken out of me for the variety of memory sticks, cd's, cables etc
biggest frustration is not being able to carry tools - if i could take a torx driver and 2 philips head screwdrivers in my baggage, i wouldn't have to check a bag for overnight european trips! ... well generally, i inform the customer that they'll need to provide them onsite or else I'll be delayed