I'll state here why I am so angry at them ...

Not only were they stupid enough to do this, they were stupid enough to admit to it and stupid enough to think it's clever.

So many people damage sacred sites and get away with it. For example ..
.. the wedge tomb that had a bonfire lit on top of it to celebrate a gaelic football victory, cracking the cap stone in two.
.. a dolmen I recently visited moved and rebuilt to look nothing like it's original form.

There are so many cases like this. People can not be allowed to get away with these acts of 'megalithocide'.