Yea that just sounds dodgy.. Watsapp I mean come on... With the recent news that South African Gov. is acquiring technology/software that can access anyone's watsapp with out our consent.
And I have heard from one/two reliable sources that its being done at the moment, but its directed towards the guys that the cops want, the bigger than your average grow.
I find watsapp is the TOTALLY WRONG app for any of us... Telegram is WAY!! more secure, no trace of message left on servers, Russian servers, 256-bit symmetric AES encryption, and end-to-end encryption. Basically they got you covered.
SO DONT USE WATSAPP!!!