At least something has happened for a change even if it is using him as an example. I have always argued a player should receive a card if they touch the ref, even if it is just a pat on the back! We often complain of cheating refs or the bias of them and from a psychological perspective I believe a player should not touch a ref even if it is with good intentions.
I will always support penalties against any player that does so. Ronaldo,s touch not only showed the arrogance of the man but also is disapproval towards the ref in a physical gesture, where does he think he is Sunday League Football. I hasten to add though normally I have seen Ronaldo keep his hands firmly behind his back, also I accept the use of a vocal protest but only if non abusive and within reason, if of a valid and no cheating nature....after all refs are only human lol