I am on LinkedIn, in my industry it pays to be networked and connected with others in my industry. I don't see any harm in being on LinkedIn, it is free and you can connect with others in your industry or that you know (went to school with etc.) it can lead to jobs being brought your way, people looking to you for consultation, etc.
I would recommend it. Not only can people find you, but you can find people. If you want to target a certain company for a job or a contracting gig, you can look up the company and it will show you who in your "network" works there. It could be that foot in the door.
And once your on LinkedIn, no more annoying emails. Problem solved!
i recommend it. you really can get connected to others within your industry/work and benefit from its networking availability. i would be surprised if most consultants of any industry find it a negative experience.
Absolutely join. The networking can be valuable and it's a great way to keep in touch with people that you know from work but don't want on your personal facebook.