Has in the past, is doing so now, and will continue in the future. I thought everyone was on the same page regarding GOP deceit and their general disingenuousness.
Just because you follow multiple magazines/communities does not mean everyone does. Just a few days ago I saw someone tell another person the exact same thing, to not post in multiple places, and I, along with other people, pointed out how we’d only seen it one time, because we didn’t follow all the same communities/magazines. That’s why people post to more than one place, and why I will continue to do so.
Might wanna google how federated services work and think about what having different servers with similar user bases might mean for duplication. This is a patently absurd request to make on a service like this.
I would expect it to mean that there is different content in the communities because they are different in nuanced ways. Having people who consistently, intentionally post duplicate content to these communities dilutes those differences, turning them all into copies of each other.
Tabe it to the extreme: If every instance had a /c/technology that had all of the exact same posts on them, what is the point? That's why I think this behavior should be discouraged.