I'm not saying it isn't a problem... the larger issue of littering in general, and wildlife preservation are huge to me. We have very well managed waste disposal sites, and do a lot of subsidizing recycling efforts.
My point was that if you aren't littering, then the net cost to the environment isn't such a huge thing. I'm also not a fan of government subsidies in general. Your point really isn't a subsidy, it's a means of greater use, which is generally considered a good thing. Unless you'd rather have more environmental waste that isn't used for any secondary purpose.
I'd love to see more/better efforts with regards to wildlife conservation, not littering etc. I like to do road trips while on vacation. Seeing the shear amount of litter on roadways, in the mountains and everywhere but a proper trashcan that will get disposed of reasonably is upsetting. Frankly, I think that getting society as a whole to respect their environment and other people's property (littering and vandalism) would go further to improving things than not.