At least in my industry the only people who have LinkedIn are marketing people and sales reps. Why the fuck would I ever want to join a social network full of those people when they waste enough of my time coming in to talk to me in person? Idk if someone I was interviewing showed me their LinkedIn I would be confused more than anything else so I think it depends on the industry.

Drive a Toyota Corolla currently and with gas prices going up I wish I was driving a Prius