If you were a victim of vandalism, what would you do?

Not that it has happened to me, personally, but I'm you may all remember the case of the unfortunate lady who some neanderthals threw a bucket of paint on after she'd finally, finally obtained her very first coord (I cringe every time I think of that horror story), and I'm pretty sure I recall another story where someone threw an egg at another lovely lolita. Fortunately, I don't hear of things like this happening very often, but condolences to those who have been most unfortunate. To the point: if you are a victim of vandalism - say in your very favorite, very expensive dream print that you've slaved to obtain for months - what can you do? Would you be able to sue them for the damage of personal property and worth of the dress? And what could you possibly do if your vandals get away?