I must admit,
credit card surcharging in general doesn't annoy me,
actually depends on how tight the margins are,
if its one of those businesses that have a few % margins, then a surcharge doesn't bother me, and it must be reasonable,
however, when I see Amex charges more, then VISA/MC, this really gets my blood boiling,
I get annoyed at AMEX and diners, they have the guts to charge more as a merchant, thus exploiting their position,
eg if you saw a Mcdonalds charging more because all of the other ones near by had closed down, all hell would break loose,
so when I see these merchants charging more, I feel like boycotting them completely, I probably don't use most of the features of a credit card, and hence it must be the reason why, I see no difference between an AMEX and a MC/Visa,
so in a perfect world, I would love to see Amex and Diners go bankrupt from being boycotted