|vanessa7777 you can not make a untraceable phone call from...|
a lan line
a cell phone
a phone booth [if you can still find one]
If you can be traced in those why would you think its different on the internet?
You mention the call not being traced back to you. Do you understand you can always be traced back to your wan ip? But even given that it would take a sobpoena to your ISP before you were matched to your wan ip.
Your concern is unfounded.
Being on facebook or other same type web page puts you more at risk than a phone call by any means.
Answers are only as good as the information you provide.
How to properly post a question:
Sorry no tech support via PM's