Hi Patricia,

This would be better asked of the Medium folks. There are a number of very active Medium representatives that can better address what they do about identifying bots. This is not something we deal with at the editor or publication level at this time. We have the same controls you do. To block a person or not block a person.

You might want to visit one of the Medium run publications such as TalkBack. https://medium.com/talkback/hi-c554c4d69669#.f05oxkkps

Sean