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According to my Experience,
It is not possible to block the particular person's sites.
You might be got wrong information.

I would seriously doubt this would ever happen.

You IP may get blocked. Anyhow, what exactly did you do and how is this blacklisting manifested?

i don't have such news update about this. Currently i think their is no such algorithm available for banning the server. If it will happen then how can they find out the banned website or reason to banned those server for one website. It is to difficult to do. There plenty of server providing the hosting service and they host many domain at one server. so why should all other business needs to get impacted?

IP could be blacklisted but not a person