As a teacher, I see kids throw stuff away sometimes that I think could be reused or donated (it's an affluent area and most of them know their mom will just get them another one anyway, no questions asked). I do insist that they recycle their paper in my class (we have a semi-new recycling program at the school...) and may chide them for throwing paper in the trash, but it's up to them what they want to do with their stuff. If a parent called me to yell at me about "allowing" their kid to throw something away, I would probably laugh.