Now I am as hostile to the Common Agricultural Policy as to wind-farm subsidies, and most probably you are, too. So using it as a stick with which to beat the French is just fine by me.
But headlines like this don't smack of clever euro-bargaining:
David Cameron to warn François Hollande against challenging EU rebate - PM to tell president: abide by deal struck with Nicolas Sarkozy or UK will demand major cuts in EU subsidies to French farmers
No, they smack of Schoolboy George Osborne playing to the gallery.
By all means take Hollande quietly to one side and mark his card for him. But if you come across to the grown-ups as playing silly buggers when long faces are in order, you'll soon find they are cutting the important decisions in rooms to which you are never invited.