Prejudicial is an adjective which means causing or tending to
cause harm, especially to a legal case. It can also be used to describe a person showing prejudice to an idea, person or group of people. It can describe something which is potentially dangerous,
disadvantageous or
counterproductive or in extreme cases an action or actions constituting treason.
Teenage spite monkeys are
prejudicial to useful information being published on Urban Dictionary
Those arseholes in charge of Twitter
tipping off terrorists that they are being investigated is prejudicial to the safety of the
civilised world.