You don't need to broadcast to your network of contacts the new connections you make with recruiters and the job search groups you've joined.  Place your mouse on your picture in the top right and choose Settings & Privacy. Under Privacy Controls select Turn on/off your 

activity broadcasts and uncheck the box for "Let people know when you change your profile, make recommendations, or follow companies." Also click on "Select who can see your activity feed" and make it only you.

When you start joining different job search groups, it is heavily hinting at your job search activity.  You can continue to take advantage of using such groups, but change the settings so that the group's logo does not get displayed on your profile.

Go to the group and click the More tab followed by Your Settings in the dropdown menu. From there you can click the Visibility Settings to uncheck "Display the group logo on your profile."

Social media allows us to openly speak what we're thinking and feeling, but that doesn't mean advertising to everyone that you're looking for a new job or suddenly making an update that you're willing to relocate in your status or summary.  These are details that should be left off your

LinkedIn profile and saved for more personal conversations and job interviews.