Shoutbox

I believe the point made by the poster was that if you choose to pursue this kind of monitoring, you should not do so surreptitiously.  If your children know they shouldn't have any expectations of privacy, they just won't do "it" -- whatever "it" might be -- and that should serve your purposes just as well or better than catching them doing it.

Personally, I suspect most of the potential issues there can be better addressed by precautionary instruction regarding what they might encounter online.