i just returned from nigeria.landed in lagos.immigration officials quite rude.flew to port harcourt.people very friendly and helpfull when they get to know you,and find out why you are there.also the police.
things to avoid.dont tell them if you are dutch if you are.dont wear t shirts with SHELL logo.i enjoid my stay.only pepper who was to hot for me.the nigerian pepper.try it.the mexicans can learn from it.
i am a kiwi by the way.from the country of people with an open mind.