Nothing like this has ever happened in this world before. The BBC is telling its users they will be destroyed socially, in employment, educationally, or in other ways if they use offensive language on BBC sites.
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My advice to you is to stop visiting the BBC online, and whatever you do, never give them personal information, such as that asked for in order to make comments.
The BBC needs to be punished by users in the same manner they threaten to punish users. Warn your friends about this so that people abandon the BBC as a news source.