"collaboration"

I'm of two opinions (maybe 3 or 4) on this matter of Facebook and Ryerson. Yes students have been doing what they did for years, and actually a prof from another university states that he encourages it but values the marks of such group work lower. Technology makes this type of "collaboration" easier, which I think is the crux of the problem. I like the other profs view (I think he was from U of T) in that he's aware of the groups on Facebook and encourages students gaining knowledge by helping each other, but actually does the bulk of his evaluation via exams.... in other words, sure, help, collaborate, "cheat" as much as you want, but in the end, show me what you've learned. Maybe it's like when the use of the calculator was viewed as a form of cheating?