So most top exchange can detect it:
Binance's partnership with Chainanalysis to detect "Dirty" Coins...
Maybe you were successful with your little experiment, however, it doesn't mean that they are not going to look at your account in the future. And then when you least expected, they will suddenly freeze your account or worst confiscate it.
But how in the world are they going to say that mixed coins just 'arent valid'.
For example, if I cut grass for Bitcoin and one of my clients is a privacy enthusiast who regularly uses mixers for his stack.
What happens when I try to deposit these? My account is now frozen? Bitcoin gone?
This just doesn't seem right. I'm trying to wrap my head around how they would be able to track something like this. Someone educate me, please.