Well at least my wife thinks I am. After finishing off a sprue I like to cut the pieces smaller and put them old juice bottles. Now I know I'll never use anything like that I just can't see myself throwing them in the trash and I don't think they would be recycled. Not a tree hugger but just hate to see plastic in landfills,however small.
So anyway just like to know what others do with old sprues, I'm sure most are thrown away. Here's about 4 years of mine......