Vandalism is rife all thru our society sadly these days & am not surprised at all that this event has happened, disappointed but not surprised.
Perhaps stand on the outside here looking in. Here we have some individual or individuals that are at their wits end re the noise. Now I live on acreage but have to endure my neighbors barking dogs whilst I try to sleep during the day so I can understand the frustration of some just a little & this is not condoning what these fools have done in anyway shape or form but I can understand in some small way what they did which has obviously higher ramifications than they realize here. Our judicial system shows a much higher level of understanding than any sane person can fathom by letting off criminal acts such as this with just a slap on the wrist, that's the real problem here not the actual act. This is obviously a last resort, humans can act way out of their normal comfort zone when pushed hard enough.
As Capt F alluded to here someone knows more than the average graffiti nut by disabling the A/C for more than just a days clean up value, that's the real concern here not the poor art work which just shows someone's low level of intell, there's more behind this than it appears I'd say.
Security at any Drome is only as good as the weakest link as this eg has shown.
Like 9/11 we where all caught off guard (we as in the western world).
Terrorism, acts of vandalism & even the morons on the other end of lasers aimed at A/c will continue once the initial reaction has passed.
I do hope they find these fools & make an Eg out of them as it might stop someone else in the future to do something similar, that's about the best we can hope for when humans are involved !
Wmk2