The thing that most befuddles me are the reports about pens snapping or breaking in the pocket. Back pockets, yes, I can see if one sits down with one's weight on a pen, but I'm trying to figure out whether front pocket stress is enough to do something like that.
As I've said, I've carried my vintage celluloid pens, a la Esterbrooks and Sheaffers, for sometime now in my front pockets, nib up, with a sleeve, and haven't seen cracks or signs of damage.
In my case, I had the pen in my front pocket when it snapped.
I still shudder to think of it.