I think Steve is probably referring to the label, crazy (or barmy) as applied to a person, due to such terms having fell out of favour with regard to the mental health of any person. These days it is more accepted to apply such terms to an action rather than a person. Thus, Adam's multiple reply method might be deemed 'crazy' without implying that Adam himself is 'crazy'. This may have been what Gascoigne actually meant. Though, I am surmising here.