Who guards the guards?

Driving from Dalkey to Dun Laoire this afternoon at about 3.20, I spotted a garda car (reg. 02 D 61715) illegally parked near Glasthule - on double yellow lines with 2 wheels up on the pavement.

The two gardai were further down the road, putting a ticket on Peter Caviston's illegally parked blue merc outside the Eagle House pub.

Surely the gardai are supposed to observe the law while enforcing it?

I'd love if there was some way of giving them a ticket but they'd be sure to get you back!