Used to protect against unwanted memetic and/or advertising.
The SpamShield can be set to several modes, depending on just how masochistic the user is - No shielding, rewording, or deleting are the 3 most common. No shielding is just that - everything comes through.
Rewording prepares a one- or two- sentence precis of the communication that is engineered to be memetically null. This is spotty at lower levels of AI, but higher ones may choose to subvert the user.
The third goes through and deletes anything which references unwanted subjects. This again is intermittent until higher-level AI's kick in.
Text by John B
Initially published on 31 December 2007.