I know of a field who charge an extra £5 for the use of the lights, but I think that is not unreasonable.
But my bug-bear is Exeter. A friend and I got caught out landing a few minutes after the stated hours (19.00hrs on a Saturday in July!) and got hammered for out of hours charges, even though ATC were there and the airfield wasn't especially busy.
They are not part of the Strasser campaign, and should be ashamed of themselves