Credit card charges
Agree 100% on the rip off they enforce on Irish passengers. €2.50 per passenger per leg, even if one credit card is used to pay for the entire booking.
There's no way the credit card company charges that level of charge, and the other major annoyance is that it's not shown until VERY late in the booking process.
The other aspect of this is that FR won't accept payment by debit card in Ireland, as they know they would not be allowed to continue with this level of charge.
It's not fraud, in that you are told about it, but the manner in which it's levied, and charged, is getting very close to it.
Maybe the answer is that all web sites should be forced to advertise the fares at the start of the process including all the charges, so that this nonsense of a 0.01 fare than ends up being 35.00 + is once and for all ended.