Vile is one of those buzzwords now. Like a footballer using 'bottle' or a One Direction fan using a hashtag. It's so amusingly overused it's completely lost all meaning. People aren't spiteful or vindictive or manipulative anymore. They're 'vile' and often for very little reason. It used to be people earned these monikers. Instead now they're bestowed on the basis of someone taking a disliking to them on a reality TV show.
Also interesting that it tends to be used almost exclusively to describe women on reality TV shows.
Female contestant 1 ..."vile"
The level of general hate towards female TV personalities would be tragic if the need for thesaurus wasn't so amusing.