Virtually everyone agrees (other than the psychopaths who populate its sewers) — Twitter has led to a coarsening of debate and a new nastiness in our politics.

Much of its ugliness is compounded by cowardice, the tendency of its many ranters and rages to hide behind pseudonyms.

However, such is the malice of the medium is that reasonableness and responsibility go out the window for other users in their bids to grab attention.