Langauge issues[]
Look at all the locations where children are being kidnapped from ?
The list of beaches ? or at least mentioned all the other newspaper evidence Mark collected of the incidents...
How many languages will they (Sofia's minions) have to train the new little Sisters in ??
An awful lot of travelling around by long range submarine when they all probably could have been taken from just a few english speaking locations in a very short period.
Seems also a bit complicated scoping out victims on land from the water to locate the house to take them from, and getting them into the sub without some significant number drowning.
More mysterious I guess than having a gang of Lambs least spliced up goons do a mass kidnapping from a few coastal towns and then get them out to a sub or even just a boat.