Yeah, there are a few questions asked here which could be valid.
Running over the line, one must be a real goose.
If the mob is too fat or unfit, he does not belong there in the first place.
On a short handed boat using a halyard and helming would be a big ask.
At the end of the rescue, back aboard again, the mob should be ready with his line cutter to slash the line and dispose of the sea anchor if necessary.
An mob exercise using this tool would be a must!
It is an interesting concept.
Would it work? Is MB right?