Has Facebook even started federating yet? I haven't bothered blocking them until I see a reason to but I've never even seen a Threads post anywhere.
7% of active users signing this thing would confirm my suspicions that the whole outrage is just a vocal minority, but these statistics don't prove much. You can block domains without filling out a survey, or apply other restrictions (i.e. silencing the domain) which are probably more appropriate than a full-on block.