Repairing the Hole during a round

Are you allowed to make any repairs to a damaged hole during your round?

i am of the belief that you can only repair pitch marks on the green, nothing else, but i'm not sure if this privilege extends to repair the edge of the hole from such a pitch mark!

Any views on this anyone.

Any damage on the green can be repaired.

Any? Can you repair/flatten spike marks on the line of your putt?

Spike marks cannot be tapped down in the amateur game, only the pros are allowed to do that.

The rules also state that a hole must be 4 1/4 inch in diameter and it is therefore feasible that any damaged hole could be repaired of any damage that has reduced this dimension.

The rule is that you can repair pitchmarks,yes even old ones, so repairing any other damage should come under this rule. Only spike marks are not allowed to be tapped down, but all loose impediments can  be removed.

I am sorry that you are coming across this kind of vandalism where you play, but it does seem to be more prevalent these days. Respect for other peoples property is indeed very rare these days.