I would like to see more nuance in the proposal.
If the player account has had zero activity for that period of a year, then sure, that claim should probably be forfeited but only if that account also has ZERO SPS staked or liquid on their in game account.
This would mean that they have never interacted with the SPS governance system and are likely not to be interested, therefore, sure.
If they have made a claim in the past, I would be not keen to disallow this accounts from making future claims.
Edits in italics.
RE: SPS Governance Proposal - End SPS Airdrop Claims & Send Unclaimed SPS to DAO