Physical Danger
You could wind up dead. Okay, this isn't swimming-with-sharks-while-bleeding-out-of-your-eyes dangerous, but still, there's a little risk here.
Believe it or not, real estate brokers actually have dangerous jobs. They meet with complete strangers in empty houses. They drive their cars to unknown locations or around busy cities. Some of these homes have been foreclosed on or abandoned, or housed tenants evicted from rental properties. Also, people looking to pick up a sweet deal may want to look at a house or apartment in an unstable neighborhood.
To keep real estate brokers and agents safe, companies are requiring potential buyers to meet at their office before looking at a property. In addition, real estate companies are also requiring a photocopy of a buyer's identification before showing a property. If you go into this field, always let someone know when you are meeting a client for the first time. Pre-plan your trip, and know the routes beforehand if you can.
And for the love of Pete, if you really don't think a neighborhood is safe enough, don't show it to your client. If they get shot in a blaze of gunfire, you still receive your commission, but you can forget about repeat business.