It is a combination of factors. They are actively recruiting from prisons and mental institutions to give them false hope while inflating the numbers. Prisoners and mental patients are less likely to defect from the cancer because they cannot function in normal society. These people are more likely than normal people to do serious things like molesting children, kidnapping people, and killing and eating babies. Most people in regular society, at least in civilized countries, would puke at the thought of eating a baby.
Additionally, their policies and doctrines are increasingly devaluing the present life. This has always been a problem--and, when you devalue the present life, it makes it easier to kill someone "to give them a shortcut to the next life". A combination of this and the stress of always having to do boasting sessions and field circus, and you have a recipe for disaster. Children get beaten to death because the parents are in a rush to get out in field circus or the Kingdumb Hell on time. Sexual repression, plus the ability for pedophiles to get away with it, leads to more molested children (usually by force, coercion, and/or trickery) while they are silenced about it.
Disruptive behavior at other religious events is expected when they demonize other religions. Back when I was in it, I disabled a set of Christmas lights by pulling one bulb out of each set and replacing it so the leads did not make contact. I got in trouble and had to reset the bulbs so they worked. Other witlesses have resorted to slashing decorations on private property--and egging houses where Christmas decorations were found. Unlike my workplace stunt with the Christmas lights, slashing decorations results in irreversible damage while egging houses made a mess (that they did not clean up). Add in more mental cases and increasing intolerance for the world, and you are going to have more cases of irreversible damage to private property, disruptions of church related services and community events, and even baby killings.
I can only wonder how the witlesses would feel if the cops would disrupt their boasting sessions. Perhaps removing the batteries in their cordless mics or disconnecting the corded mics and coating the leads with Teflon or other non-conductive material would show them what happens when they instill intolerance for holidays where a worker feels impelled to disable or destroy holiday ornaments. Or, disrupting the boasting session to hunt for information on a pedophile case would show them how they feel about a worldly religious or community function being disrupted. How about a public service warning about how the witlesses are a cult, as dangerous as the Moonies and Scientologists, so people will not respond to the message? I wonder how the witlesses would feel about having the police egging the Kingdumb Hell.