Bots that 'unroll' or scrape threaded skeets and publish them to a third party website, monetised or otherwise, without the consent of the OP. Let me know of any I've missed.

Thread unrollers, readers, etc.

Useful lists to subscribe to individually, do not subscribe to this list directly.

Accounts that would be kickbanned from a late twentieth century IRC server

Take a quiet moment to reflect on your sins

Accounts that are virtually indistinguishable from bots

Instead of using unrollers why don't you change your settings to nested replies?