One lesson I had to learn rather too painfully was that matatus plying various roads in Kenya are thoroughly infested with crooks of all categories. They come from various villages, I guess, and in various shapes, sizes and… yes, smells.
I also suspect that there must be a very huge underground college – that our very own NSIS is yet to unearth – where these crooks sprout from, more equipped with ‘life skills’ better than an average First Class Honors graduate.