So the way I see it is that, people affected by this, will be the ones that had unclaimed BCH which remained in legacy addresses, but only the amounts that be sitting on p2sh... so to put it simple, any unclaimed amounts sitting on addresses that don't begin with 1 can be stolen. This proves in practice, an scenario in which the schelling point to hold your coins is addresses that begin with 1, and nothing else. Nobody will ever be stupid enough to break backwards-compatibility with addresses that begin with 1 (the original format) so seems reasonable to hold your coins in such format.
Now, if you bother with the clusterfuck that is claiming coins from a fork, then go for it, but a lot of people may simply don't even care they lose those coins all things considered. I mean, I would hate giving those guys "free money", but at this point I can't be fucking bothered with any of this nonsense, im trying to relax and enjoy the holidays, last thing on my mind is having to deal with this insanity to be frank. Remember that it requires that you move the entirety of your holdings, then download some dodgy software, then have to sync the entire blockchain of said altcoin, copy the empty wallet after you've moved your funds in there, and finally dump the damn thing. All of this without screwing up in the process.
Having sold all of my bcash on launch, I received no BSV and have nothing to do with this clusterfuck.
Anyone still playing in this particular paddling pool either knows exactly what they are doing (and has the time to invest in doing it properly) or deserves the outcome they will get.