BCH fork was the most deanonymizing thing that has happened to Bitcoin. The sheer amount of data from that will taint all prefork coins for a very long time.
Just because the transactions are on the chain and visible to everyone, doesn't mean many people will get caught. All you see is money moving from A to B to C. The only way you get caught is if you send your coins to an exchange, and they rat you out.
There's no real way to identify most addresses on the chain.