I have the ability, with no accountability, to categorize anyone as anything and make that categorization public and attached to that person, like a scarlet letter. Because all lists are treated equally, my categorization doesn't get marginalized or ignored.
A big thanks to Vlad Bobleanta for bringing this to my attention -- scary stuff!
I guess it's a testament to the Twitter community that lists there have yet to be exploited in any of the ways that Mark describes in his post. Or maybe they have?
If you've heard of any such occurrence please share it below...