I generally fly a fair bit but am not obsessive about it. I hate checked luggage so I squeeze my needs into a 60liter backpack and head off to where i need to go. Sometimes that bag weighs a good 40kg In some cases I came back with far more than I started with(read: 2 60 liter bags!) and still stuffed it into the overhead luggage while the attendants watched and snickered to each other. No harm no foul.
until the locker pops open and the 40 kg bag falls on some poor soul.
Mamiya 645 Super | Nikon F4/F100 | Minolta Maxxum 9/Dynax 7/X-700/X-500/XD7/SRT-101 | Pentax Spotmatic | Canonet QL 19 (GII) | and a whole bunch of glass