What you saw is getting pretty rare. Usually thats for the high school carful of kids that were wiped out on the turnpike.
As far as I know, they dont have any special treatment, but no one seems to bother them.
And most end up in a UPS box mailed from the burner, hopefully ashes related to you and not from someones leaf pile.
The wedding 'trains' can be more of a nuisance.