Better yet, don't just put the cap back on but dispose of them properly - like all rubbish!
Never been stuck by one dam it (that reads badly - should read: " Never been stuck by one thank God"), but have cleaned up many - mostly from suburbia but some from the bush.
I had to explain this sickness in our society to my young kids (with warnings and gory details), and it was not a nice reflection of humans.
I think (know 99.9%) that it put the kaibosh permanently on their unlikely hard drug taking, but unsure of the trauma inflicted - that's another aspect of what these pricks do to our society - they bring us all down.
Joking OP, as was LW, but being approached by out-of-place looking strangers in the deep bush would raise my hackles.