Extra fuel charges when carrying passengers in your car?  Some
people seem to be justifying the way mobile networks try to
discriminate against tethering. One comment even suggests that
multiple devices is a valid justification. Really? Isn't it just
as simple as measuring the actual volume of megabytes used,
regardless of how many devices are connected?  Lets consider a
couple of analogies:    • A petrol station puts some fine print
at the bottom of their sign in the street: cars with passengers
pay an extra 0.05 per litre (or gallon). It is just a gimmick:
the marketing man has worked out that he can put a lower price
on his big sign this way and people with passengers may well be
splitting the fuel bill between them. There is no technical
reason for the charge however - the car actually uses more fuel
carrying the extra weight anyway.   • Or imagine this: the
marketing man puts up small print that advises a higher charge
of 0.05 per litre for fuelling an exotic car like a Ferrari. The
only reason for this,