The privacy implications on this will vary from social network to social network, and will be dependent on the privacy settings you have chosen on these networks.
Imithelela yobumfihlo kulokhu izohluka kusuka kunethiwekhi yomphakathi kuya kwinethiwekhi yomphakathi futhi izoxhomeka kuzilungiselelo zobumfihlo ozikhethile kulezi amanethiwekhi.