I was joking, but I would be calling from the US to canada, not making calls inside canada.
Blueboxing is still possible in some areas, it's not possible on bell areas (which is almost everywhere) but other areas have smaller telcos where it's never been an issue and where they never upgraded their system to a newer switching system. Possible but not exactly practical to locate these rediculously small telcos, right? But if you felt like connecting to a switch in Rio to bluebox, an iPod would play the tones correctly (which was the only thing I was trying to emphasize in my original draft -- that it was quality non-fuzzy sound; I personally could not care less if and where people bluebox because I don't do it).
Not quite a third-world country, but I lived in a town when I was I high school that didn't even lock their stuff up with hex locks like bell does. They just had a handle that you could turn and it would open, their setup was old and I was surprised anything worked at all (thick dust, ant hills, and weeds). I never really saw the appeal of blueboxing (and really was kind of afraid of it at the time) and the only time I played a 2600 tone through the line the phone was shut down until the next day. Just imagine a high schooler holding a crappy gateway laptop up to a crappier payphone to play a tone -- it was ghetto to say the least.
As far as "applicable to modern phone systems" -- if it still works for making phone calls, then it's applicable to modern phone systems. You can't call long-distance on at&t phones, but for the many modern payphones in the ares where I've lived it still holds true for the most part. I'm not saying you're wrong, I'm just saying that it's a different set of experiences on different sets of payphones in different locations -- it's understandable that we'd have different opinions on stuff.
Now having said all of that -- I have been phreaking on and off for about a decade and just got back into it after a long hiatus (a pretty solid few years). So if there is something wrong with something I write please feel free to correct me, after all that is why I posted it -- so I could have a discussion on the merits of it and double-check to make sure that there weren't any glaring errors on it that needed to be corrected. I will revise it a pretty good bit and clarify based on the suggestions made here.
Thanks for looking over my stuff you guys!
Griffin