I think some of them are ignorant about the effects. Many smokers I have spoken with over the years believe that the butt / filter is just cotton and tobacco and paper and will decompose very quickly.

I'd like to see more education about this, and the amount that end up in the oceans.

Someone developed a backpack that can keep strong odors inside, there should be ashtray inserts and portable small proof boxes that smokers can use, so that their car does not get the old smoke-butt smell which is way worse than the smoked in the car smell - which I gather is one of the main reasons to get the butts out of the car as fast as possible.

I'd also like to see a change in how cigarettes are made, requiring the butts to be faster to break down / decompose.

Surely these things are possible, and less litter in the future as well.