I agree. This has become seriously weird. One or two feet in the same vicinity within tennis shoes? OK, freaky accidents do happen on commercial fishing vessels and the severed body parts--which are more likely to be fingers, hands, or arms that got caught up in automated cables or whatnot due to negligence--might eventually wash up on a beach somewhere. However, in all those cases, there's also very likely to be a trip made to the hospital to deal with the resulting wound, and when the clues are put together, well, the case becomes recognized as yet another act of careless stupidity, thus ceasing to be an interesting mystery worthy of investigation.

Four male feet in athletic shoes in the same general vicinity in less than a year, all of them roughly the same size, all of them possibly right feet, none of them matching severed limbs treated in local hospitals, and none of them mathching the DNA of known missing persons: it exceeds the statistical likelihood of them being from unrelated freak accidents. It is much more likely that they are the deliberate result of foul play. If so, the perpetrator is already getting one thing he/she wants. Notoriety. I don't doubt we're going to hear more about this case in the future, and that it will turn out to be something twisted.