I issue caution. Again, it's an age question.
I do a lot of research on kids between grades 4 and 11 and we're finding that a large proportion of grade 4 kids have cellphones, for example, and text. A lot of kids have Facebook accounts, even though technically they're not allowed to because they're under 13 years old. There are good reasons to be very cautious about encouraging kids to embrace that kind of social media because it does give these kinds of messages a direct path into the child's social environment.
So yes, personally I think there is a caution there.