The only items I ever give away are metal and glass. While none of my friends would mind the pure silicone ones, since I no longer own autoclaves (previous business I owned), they can't be fully sterilized and I really don't feel comfortable with giving them to someone - regardless of the fact I've never had ANY type of STI/STD.
Most toys, I just toss because of their chemical makeup, but there are some (all plastic, etc) that I'll chuck in the recycle bin from time to time. Funny enough, it keeps the guy on our street that likes to dig through peoples' recycle bins from getting into ours (after he found that first one the first day we moved in, he hasn't touched ours since). If I'm paying to have the city take my recycleables, then I'm letting them and only them take my goodies away.