Do you have some sort of time dilation problem? Gavin Andresen has been Bitcoin toast for several years, and the writing was probably on the wall after the CIA replaced him with an android all those years ago.
And what is an OBVIOUSLY inactive wallet? There's no such thing. We have no idea what plans people have for their coins. I doubt they'd be best pleased if they were stolen from them. What you do with your own property should be your business and no one else's. If there was ever a hint of forks to reclaim 'lost' coins I'd be out of here.
In answer to your question of a(n) obviously inactive BTC wallet is impossible for some to maybe fathom at this point but lets assume this. BTC makes it past the point of a new block transaction and starts relying solely on miner fees which I believe if Im not wrong is set to happen sometime around 21(something)AD, we could most likely assume that anyone holding a BTC Wallet at that time (if showing no activity for say 50-60 years) is probably lost, and there therefore (IMO be reclaimed) after a alert to the wallet hodler.
I am aware that is a long off worry and one that might not ever happen but I just thought Id put it out there.
You can not assume a finite currency will survive more than several centuries, if for not other reason it will get lost. Especially with one so finite and complex as BTC.
Also; thanks for the Gavin info, above people. I was just wondering if he still had the final say as I saw he did commit to the latest core update...