Balewa,
Much as I understand where you're coming from, you have to understand that most of the guys making these statements are not the typical expats who are working in Nigeria and have been there awhile.
You typically have the 24hr wonder boys who come in, get dropped off at Sheraton and to them they have seen the country from North to South, East to West and are ready to say all sort of crap
Lets not make things difficult for the guys who make their daily living in Nigeria and have been acting in a mature manner. Trust me, they are the norm.