If someone wants to "connect" with me they can always google me and get my contact details anyway.
I am completely off Whatsapp for similar reasons. While I found it excellent for fast chats, the group features made this a complete mess. There is only a certain amount of messages you can handle and the vast majority was silly jokes, good mornings and what not.
The funny thing was not only did I end up wasting my own time, I also started wasting other people's time.
I am still on Twitter... so far this is not a time waster as I do not "follow" anyone. But then let's see how long.