putting lost coins into miners blocks is a good thing actually
It's good for the miners, but not anyone else.
#1, you can't identify lost coins. All you know is that they're not yours.
#2, even if you did know that they're lost, they're still not yours.
miners are good for the bitcoin protocol - without them your bitcoins would be worth close to 0
coins that' haven't moved for say 50 years ARE lost coins. by nature.
Not on "my Bitcoin network" and you need a consensus of users to make a hard fork. It is a bad idea, and it will never happen, but that doesn't mean someone discovers it as a "new" idea every other week.
please tell me why recirculating coins that haven't been moved in 50 years is a bad idea? logically please.
Bitcoin is a social contract. People value it because they trust it. People adopted it knowing the "rules". One of those rules is that transactions are irreversible and stealing the output of a transaction AFTER THE FACT is theft. Pure and simple. You can justify it, you can rationalize it but it is theft. If the Bitcoin social contract is broken, people won't trust it and when they don't trust it the value or utility will fails.
Furthermore even if it WAS a good idea 50 years (artificially chosen by you to make the idea more paletable) is just silly. If Bitcoin can exist and even thrive without redistribution for 50 years why would it suddenly need it after 51 years. The reality is it won't. So the 50 years will probably someday become 30 years or 20 years, or 10 years. The more people start changing the rules after the fact the more confidence that will be lost in Bitcoin. If you can change the "transactions are irreversible rule" why not also change the number of coins that are minted rule, or maybe help the governments of the world and change the nobody can stop/prevent/block transactions rule or the users are psuedo anonymous rule.
For this reason it doesn't matter how wonder you believe the idea is many people will never accept it and many who may be neuatral on it will never support a hard fork with anything less than near unanimous support for the massive chaos and value destruction such an event would cause.
Now if you start an altcoin which has a x year use it or lose it provision I still think it is a dubious idea but you have created it up front. If users adopt that currency they know (or should know) the rules up front and there is no ex post facto change.