Never let the facts get in the way of a good story!
Im my 5 years with Ryanair carriage of extra fuel above PLOG was never an issue - simple one line explanation on the Voyage Report and you never heard anything else about it.
Whilst I do not personally care for the corporate culture of Ryanair it would concern me that lay persons seeing this in the media will get the impression that Ryanair are flying around without obeying the fuel rules which is patently untrue.
What I think is more significant is that Ryanair with its method of business does not make an friends so the Spanish media (and even authorities) will jump on every opportunity to tarnish their image. As they say, what goes around comes around.