Who Is Listening To Your VoIP Calls? (Unknown To You!)

"Who Might Be Spying on Your Communications? (Hint — It's Not Just the NSA)", when I saw the title, I imagined a list of other government institutions and some phone companies. But when I scroll down the article by VoIP-News, it was surprising. Mafia, governments, monopolies and spouses might be listening to your calls.
I was happy to read the last paragraph because I do not want my Grand Ma (She is the one who keeps tabs on me nowadays) to hear what I am talking over the phone, VoIP Phone.
"Thankfully, there are a number of tools and strategies out there for protecting yourself and your business from online fraud and eavesdropping. If you're afraid of discussing delicate matters over IM services or Skype, consider choosing a service or system that specializes in security."
tag: VoIP Security, VoIP News, VoIP Phone, Spying on VoIP