If possible, yes, since most crossposts contain nothing in addition to the original. Just a toggle to autohide the same posts that voyager assigns the embedded tag. Multiple crossposts is just feed clutter unless you’re someone who wants to see the comments for every crosspost. And it would be a solution to not wanting to see all of the copies, but not being able to figure out which communities to block or unsubscribe from since any one of them could contain the original.

edit: just a thought, although I just realized I could possibly achieve the same thing by adding “crosspost” and “cross-post” as filter keywords. I’m not sure if those work on text in the post body.