In 48 years I have seen one and only one person who knew/cared/was anal retentive enough (pick whichever you feel applies) to field strip cigarette butts before discarding them outdoors.
Theo,
What is 'field stripping" a cigarette? Personally if I smoked, which I never have, I would take the butts with me and throw them away. I can't stand to see them on the ground.