I don't think follow bots are a good idea, because they make the federated timeline the same on every node. Without them, the federated timeline is still an expression of the interests of the node's users.
@lambadalambda I'm starting to lean to that thinking as well.
The attractive fiction of the Totally Integrated Internet is that Everyone Has the Same Data. The option with Federation is that /stuff that is worth going off-Instance/ does, /but not the other crap/.
"Worth" is, as always, subjective, but it's indicated by the collective interests of users. An element of "data physics" is the loss of friction and momentum. Organic following dynamics restore some of that.