It's just another case of the media selectively reporting stuff to cause panic. They aren't more frequent, people just get a boner for stuff and it becomes the hot topic for a while. Everywhere that sink holes are common, the USGS has had mapped out the probabilities for decades now. Sink holes are caused by water, so I fail to see how you could blame some kind of bat shit crust destabilization theory to it. Most infrastructure (water mains and storm sewers) is from the early 20th century, so it's going to start breaking down more and more as time goes on. This recent thing caused a huge boner amongst the people who like to find panic in everything simply because it happened under a house.
Please come join my forum if you're not a trendy and agree with my points of view.