I don't know anyone else who carries a knife or shows an interest in them, but then again i don't know many people, either way i rarely see any pocket knife clips on people in my area so i don't think it is a growing trend, at least here in the bay area of CA.
I like trying to get people who are close to me to carry a knife, like my younger sister carries a spyderco squeek she loves and i convinced another friend of mine to get a paramilitary 2 some while back and he has used it a lot.
The only people iv'e seen carrying knives weren't carrying anything too good, stuff like S&W folders, and they didn't know about brands like spyderco, benchmade, ect. when i asked them about their knife interests. Once i saw this girl at a mall carrying some no name brick of a folder in her rear pocket, i deduced that she was carrying that thing as some sort of fashion statement because it looked useless lol.