not as easy as you think. it really depends on where you are. some places don't even offer landlines anymore, and this will only increase. i am not thinking about right now, but in the future landlines will be gone completely, so this is not a viable solution.

besides you have to consider that all the other kids will not be limited to such a phone.

we need to create communication tools that are "safe" but that kids actually like to use too.