> Coffee shops, schools, and airplanes all block certain websites. Do they do it to block bandwidth hogs like video streaming sites (and "think of the children

> Coffee shops, schools, and airplanes all block certain websites. Do they do it to block bandwidth hogs like video streaming sites (and "think of the children!" content, in schools), or is that coffee shop blocking review sites, info about competitors, etc? I think that what they're blocking and why is more important than the fact that they're doing some blocking/redirecting in the first place.