Watching Simon Dyson's DQ incident in Shanghai it was an almost unconscious action that saw him pick up his ball and use it to push down a spike mark on his line.
But rules are rules, even if they are antiquated and nonsensical.
For instance If a player was playing in the second to last group in a Major, and was level with the leader, what’s to stop him laying a trail of spike marks around the hole to make if difficult for his opponent? Oh yes, etiquette, I almost forgot.
Time to leave down the china tea cups R&A, and look at this rule.