This is completely wrong, your coins can't get "taken by someone who gave themselves the right to do so" since Coinjoins are completely non custodial.
You misunderstood. The quoted part doesn't refer to coinjoins and Wasabi. It goes back to
this post where I explained that just because blockchain analysis gives the green light that certain coins meet the requirements to participate in your coinjoins, it doesn't mean that other services (like exchanges) will agree. It's exchanges and centralized services doing the coin confiscation because they don't like the history of your coins or the lack of one.
Ah. Yeah, centralized exchanges will lose the ability to make this decision once they upgrade to Lightning:
Did you mean "doesn't this prevent already surveilled users from having their privacy established?"
Could be, but not necessarily. We frequently notice centralized exchanges (which have partnerships with chain analysis companies) to simply deny coins coming from mixers.
I think that's why Lightning is so important: Exchanges will be forced to adopt privacy friendly deposits and withdrawals because they can't afford to transact on the nonprivate base layer forever.