Thankfully i have never been robbed purchasing or with possession. i always tend to take some precautions, dealing with only people i've grown up with, or people ive known from middle school to high school. most of the people i pick up from or toke with are all people i have grown up with or known for quite some time so nothing has ever happened before.

i would tell the younger ones, or people who dont know:

you should never go alone to pick up unless you are tight with the person because you never know how sketch some people can be, always go with atleast one other person.

NEVER let people come to your place to pick up or drop off, it could result horribly.

INSPECT your merchandise before paying, ask them to scale it or bring your own if you think they might be chinsing you. also look at the quality and count.

i know most of you know this, but for the ones who dont...