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Spamming comments is frowned upon by the community. Continued comment spamming may result in the account being Blacklisted.

I cannot say hello to people?

“Frowned upon” should be punished by downvotes not blacklists. I for one want everybody to speak freely. Even if it is repetitive and annoying. I don't want some self proclaimed and unaccountable “hivewatchers” to decide for me what I am allowed to read.