Your point would have been valid if he was attempting the collection of personal information, however, none of the data in all the topics you linked here are personal or private, this is all public information which is/was available for anyone with a cheap VPS to store, the interpretation of this public data remains a free-choice, everyone can do whatever they want with it as long as it does not violate any rule/law.

To put this in another form, knowing when someone joined/left a signature campaign or deleted x number of posts within x period of time does nothing to their privacy.

If you think this is sort of privacy invasion,then linking alt accounts using their BTC or eth address is even worse, and I think most people do that ,and nobody complained.