Who would steal Ian Curtis' gravestone?

Today was one of those days when an act so utterly stupid and disrespectful makes me wonder what's wrong with people?
The memorial stone on Ian Curtis' grave (left) was stolen from Macclesfield Cemetery late Tuesday or early Wednesday.

It seems that some people think just because someone is or was a public figure or famous person, their homes, belongings and even graves become public domain.

The BBC article mentions the fact that there's been a renewed interest in Joy Division and it is indisputable that over the past year the band has been the focus of the most attention since their demise almost 30 years ago what with album reissues, Anton Corbijn's Control and Grant Gee's Joy Division. This attention renders both good and bad effects apparently. The good being that more people, like myself admittedly, are turning from being peripheral appreciators of Joy Division's music to actual fans by learning what they were all about and recognizing their importance, and not seeing them as just a means to the New Wave phenomenon that was New Order. The bad being that horrendous acts like grave robbery happen. Is this the ultimate collector's item?

There's no CCTV in the cemetery so let's hope it doesn't take too long to restore the site.