I watched the Wire, and my cousin just moved out of B'more.
Obviously the odds of something happening is pretty low if you take precautions, BUT the more strangers you meet on craigslist (or other public ads) to buy or sell, the higher the odds get. When you're dealing with high value tangible goods and cash, high value means high value target.
Not something to lose sleep over, but certainly one of many considerations, especially if you have family to take care of and/or protect.
On a related note, how in the world are both McNulty AND Stringer Bell BOTH British?!!!!
Great acting.