I know that there has been quite a few replies to this already, but I just wanted to chime in: I don't want people spying on my stuff. As soon as IPredator opens up, I'll buy an account if they're any better than Relakks (PPTP sucks ass!).
I'll use it when using WLAN on the train, when using unsecured WLAN at the university, when I'm at my parents', when I'm at the library, whenever.
Oh. I smoke weed as well, and I quite like having paraphernalia available; luckily I live in Europe.