I have to agree on this one, the litter ejecting traveler/motorist is a big annoyance to me, the sight at the side of slip roads as I am queuing to get off is sickening. Always the same stuff, well known brand takeaway wrapping/boxes, ale cans and a lot of clear plastic bottles with orange juice in them although I am not sure that's what it is.
On points on the license I know of one person who got £60 fine for throwing a cigar butt out in stationary traffic, done by a copper walking by.
I will add my rant now - the 'environmentally confused' who pick up dog droppings from over the fields where it would break down naturally, bag it, then carry it and then hang it in a bush as they leave the field. How do they think that works out.