Seems a trivial work around for this particular issue, although if you are using centralized exchanges then the IRS have all your details anyway, so the whole process is pretty irrelevant at the end of the day.
Depends what you mean by 'centralized exchange' to convert to fiat to cash / cash equivalent then more then likely you do have to go through KYC.
Just to trade alts and move money in and out of a stable coin to do it. Then no, there are still some left that you just need an email address to use with low but usable withdrawal limits.
There is risk, obviously of using a exchange, but to 100% say that you are giving away PII is not fair.
-Dave