Especially with fuel prices, FT is crybaby central lately, legitimate gripes or not. So I definitely endorse this thread.
Personally, I've had very few bad experiences in a decent amount of traveling. But maybe I just don't expect as much as some people here.
A few weeks in Panama City, Panama I was surprised at how honest and friendly the cab drivers happened to be. You really don't know what your going to get in some countries with cabbies, but I had only good experiences here.