LinkedIn are bloody annoying. I uninstalled their app after they started showing that I had unread items, which where just paid commercials and not somone wanting to talk to me, of course it is a trick they had learned from facebook and twitter.
Sort of same thing happened to Twitter which I rarely used. They started to ping me with an alert everyday that someone had tweeted something when I hadn't been using their app for 24 hours. So Twitter got uninstalled, didn't care for it anyway.
And again it happened on facebook before I deleted my account. When I hadn't been on facebook for a few days, they pinged me with an update that someone had said something. When I checked it out, it did not even have anything to do with me, it wasn't directed at me or tagged etc.
So I uninstalled their app. Then they started sending me emails instead about "someone did something"(really, that was about the wording of it).
When I disabled emails, their clever tatics ment that I would not get notifications if someone was contacting me.
So the only way I could use their platform as a message system was to constantly use time on it.
I deleted my Facebook account, it has been a slight annoyance because family members assumed that I had been updated on different family related news, but mostly it has been great to do without all the mindless jibber jabber. :D