Originally Posted by
SFOSpiff
I guess Frankfurt (or is it Germany as a whole?) is not one of the areas where the fine is payable on the spot?
btw, a little tip - when you're asked for your ticket, be careful if you keep it in the same pocket as your money. I'm not sure if the Berlin ticket inspector was more offended by the idea I might have been trying to bribe her, or by only offering €5.

I am not sure whether the ticket inspector was really offended.. especially in Berlin, humor is very subtle and sarcasitc, so they may just have been joking.
And no, most transport companies don't accept instant payment, to avoid just such a case where an inspector is bribed by the passenger (or even keeps the money for himself). Also, most transport network operators offer the possibility to reduce the fine by showing a (forgotten) monthly or weekly subscription ar the office - obviously this wouln't work if the people had to pay their fines instantly.