Hello all,
This way, they could be viewed or not viewed by the recipient, or the recipient could choose to have the emails caught by the filter to be directly deleted. Yes, people could set up their own filters on their email accounts, but then that puts responsibility on the victims, and arguably wouldn't be as comprehensive as the Detox tools.
I would say users having this "tool" in use might want to have a message on their user page saying they are using such tool to filter potentially harmful communication. This is because these tools are imperfect and innocent communication might be caught inadvertently by the filter and never reach the recipient. I would hate for this to stifle true collaboration and communication efforts, so hopefully this note on the user page (of course at the user's choice), would help to mitigate potential upset from an unanswered communication.
The trouble I would find in using such tools would perhaps affect the most visible and most in-need of the tool of the community, and due to their role, might not be able to use said tools. I'm thinking of administrators and others who might receive communication with inappropriate language not directed at them, but as an example when users are asking for help with situations.
I am extremely, extremely uncomfortable with email moderation. I cannot emphasize this enough. Frankly, I'd rather the NSA be reading my mail than my fellow Wikimedians - they have no actual interest in anything that I'm writing. If moderation became standard, I'd shut off "email this user". It would be a cure far worse than the disease.
It would also be unacceptable for the role accounts that are standard on many projects - on English, we have special role accounts that link directly to the Oversight mailing list, Arbcom, and a few other places. Not only are they moderated by the list owners themselves already, but the contents are usually far more confidential than would be appropriate for a moderator without the same level of access as the list itself.
I do like the idea of being able to block emails from certain accounts or to only accept them from certain accounts.