@ArcturusSaDiablo
Just taking the counter argument here:
1. From what I remember, it was only done from the start because we were a federated instance of Mastodon and we were trying to identify posts from our instance. That hasn't been necessary in years.
2. Maybe, assuming someone screenshots the entire post including hashtags. If having your posts stolen is a concern, the way to mitigate that is to post to followers only and tightly screen your followers.
@voltronic
I think of it as more of a way to ID the source in case it show up elsewhere. See also, "If it ain't broke, don't mess with it."