If anyone thinks defamation or libel is constituted by saying someone plays golf with someone else they are dreaming.
How about actually taking the trouble to look the criteria up on Wiki or similar before making these daft and misleading suggestions that naming someone on the internet is actionable? We are constrained enough with real rules without adding made-up urban myths like this to further stifle our every action.
Defamation is such a serious and UNTRUE allegation against a person that they suffer loss or their standing & good character is publicly damaged. You've got to do a whole lot more than merely refer to someone as a thieving pikey to do that - golf doesn't even begin to feature!
A bit of reality wouldn't go amiss, people!