Whats app used to be cool before it got spammed by supermarkets here, you write to the Whatsapp support team about it and all you get is a stupid auto generated message telling you how to install it. Their support lacks any human factor and is useless.
I've deleted it now, and no longer use it due to the amount of spam and lack of customer support.
What makes you think Instant messaging on *any* platform is safe? If the NSA or anyone else wants to spy on my wife bitching about her co-workers, or me making inappropriate propositions to her while she's at work, I'm not gonna worry about it. What's app never gave me any confidence it was some how less *gaping* (haha) than Verizon.