There is a rule, actually. If you go to the Terms and Conditions, under posting etiquette, you will find this line:
". Cause disruption by hitting the return key repeatedly or using large images so the screen goes by too fast to read, using all caps to "shout", spamming, or flooding (posting repetitive text)."
Now, whether or not the rule is enforced is the issue. With so many posts to look at, I'm sure that some will not be picked up by the mods (definitely not in game). If you have an issues with a community member's actions, you can always send an email (members@worldgolftour.com) if these problems continue. Try to include a screenshot if you can, since the WGT staff need some sort of proof before dealing with the player in question. Hope this helps, and happy hitting to everyone! =)