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yeah, that's why you want to find one that won't. or at least, won't do it in a way that will leave you high and dry without notice.

This is unusual, and it would likely only happen with a respectable registrar if there was a dispute with ICANN.

...or an ICE/DHS seizure conducted independently of your registrar.

Isn't this exactly what happened to the person who posted this?

Yes, the registrars handle the ns assignment which will make DNS moot if modified or deleted.