this is basically theft...
just send the SPS to the wallets.
Or if you going to take it, burn it. There should be no financial benefits yielded from taking these funds from those wallets.
I am sure that there are cases were it will not be possible for claims to be made, it could be due to death or lost keys, who knows. In those cases, just consider the tokens burned.
RE: SPS Governance Proposal - End SPS Airdrop Claims & Send Unclaimed SPS to DAO