Use an avatar to represent you online. Don't use a current picture of yourself on your online profiles. Rather, use an avatar (a representation of you) for your profile pictures. You can use the same avatar on all your profiles, or you can use a different avatar for each site.
Check them out!
Once you create your avatar, use your snipping tool to snip your avatar. Then save your 'capture' (snip screen shot) into your file. Now you have your avatar to upload. Create as many as you want.