You've surely heard about Tor, socks proxies, VPNs, SSH tunnels.
I.e. you make one opsec mistake now, nobody's perfect - and then many years later when someone will finally care, this will be used to identify you, there's loads of examples like that of investigations/convictions where the people did know how to use "Tor, socks proxies, VPNs, SSH tunnels" and used them properly almost always.