What's The Worst Automotive Social Media Campaign?

Carmakers are good at making cars (most of the time), so it would make sense for them to stick to that. Naturally, this doesn't stop them from trying out social media campaigns!

The very worst of the worst was, as far as I'm concerned, Lincoln's Twitter-sourced Superbowl ad.

Daaaaaaaaamn what a mess.

But surely there's some ad run with 'Vine Influencers' or some shit that I don't remember. What's the worst social media campaign for a car company you've ever seen?