Comment by Foxboron

The issue is that it also becomes easy to game. I've abused the fact that bots repost lobste.rs by timing my post submissions, I could have had this front-page post as I posted this to lobste.rs originally.

This makes the HN front-page less of an organic thing, and this is an implicit vote ring behavior few people have access to. It also makes people interested in lobste.rs for this behavior, which our community is not interested inn.