The destruction of one's family relationships with the wave of Kingdom Hall authority administered without mercy could bring on such retaliation, I'm surprised this hasn't happened many times last Kingdom Hall fire I remember was by a very mad Korean unbelieving husband over his wife's attendance and that was many years ago perhaps 20 or so.
I would expect since the Society has no insurance on KH property that some might capitalize on this fact to deny profits to this ugly Corporation. So I could easily see this becoming more common as time goes on.
I would like to think that the WT corporation will start selling all it's property soon to avoid too much property value losses as their notorious nature as a blood sucking mind control cult becomes common place knowledge all over the worldwide web.