For that we have technologies available to keep Bitcoin fungible. We already have mixing/tumbling services and CoinJoin applications, which are undervalued by the community.
I agree, but you've just said you would recommend that newbies don't use these techniques. If people don't use them for fear of receiving tainted coins, then this nonsense metric has achieved exactly what it is designed to achieve - making invading your privacy and tracking your transactions trivially easy.
There is no technical solution to this purely political problem. We have - as o_e_l_e_o said - to stop buying in to this "taint" nonsense.
Exactly. I mix, coinjoin, and otherwise obfuscate every single coin I touch. I have never once had to deal with my coins being tainted because I do not deal with any entities which enforce such nonsense. Can you imagine if Walmart started saying every customer has to show the cashier their bank statement first so the cashier can see where their money is coming from? The result would be outrage as well as a huge hit to Walmart's profits. But for some reason this community, despite being founded on the principles of self ownership and no third party control, are fine with this exact scenario, and continue to use and support exchanges which are openly spying on you. It is mind boggling.