This is madness. The first problem is how can you identify lost coin if theres a recent event that an old address move their token recently? Doing this will make Bitcoin centralized since you will remove the freedom for people to hold in long term period because their coin might be categorized as lost if they didnt touch it for long period of time.
Let's say we don't identify lost coins, but inactive wallets. So the coins in a wallet that as not performed a transaction in 109 years (full bitcoin mining life), will be reintroduced to the network by another cycle of mining. In this way, we wouldn't steal money from people, because they would be able to prevent the reintroduction, by performing a simple transaction, thereby "verifying their activity".