I'd LOVE the capacity to set preferences on following. For example, if you're already following 1000+ people - really? Good for you. I haven't the time to give the appropriate attention to 10 people let alone 1000's.
Next? Set preferences to who can respond / comment. If you're not in my follower family. Sorry.
Finally - I'd like to screen who follows. Lately I've a spate of what I assume are spam accounts. All very young women. All - zero posts / comments. All brand-spanking new to Medium.Com. You're welcome to follow me when you're:
a) a member and / or
b) contributing member (posts / comments)
As for comments lacking basic common sense / civility - yup! Blocked.