What's with the litter?

[CNY rider]

Here's my tally on a 4 mile stretch of beautiful, open road that goes through mostly farm land on my way to work this morning:

5 beer containers, mix of bottles/cans
2 soda cans
5 food packaging wrappers, mainly chips etc.
2 fast food bags and wrappers, looked like McD's

What's up with that? Why would somebody just heave their junk out the window and think it's magically gone?
Why the correlation with beer and fast food?
It just irritates me, and was a downer to an otherwise nice early morning ride.