Future employers do want to know about you in social media. They will look before they ask!
Look at this 9-year-old's efforts, and think about what "stuff" she is putting out there:
http://mycharitywater.org/p/campaign?campaign_id=16396A few underlying thoughts:
1. Be a humble but smart contributor.
2. Be constructive and clear in your commenting.
3. Don't take credit if it isn't yours...give credit always!
4. Use netiquette...and don't assume you know it...check and self-monitor.
Get advice here:
http://theinnovativeeducator.blogspot.com/2010/07/controlling-your-digital-...