My most recent pet peeve: mobile apps that send me "notifications" which don't notify me of anything. They just want me to click them ... but why?
I am looking at my phone screen and I have no fewer than four of these right now. Twitter and Pinterest want me to know about "things I might like", and MapMyRide and Sports Tracker want me to "reach my fitness goals". Well guess what you guys? Your reward for bothering me in this way shall be that I disable your notifications. If I want to find things I might like, I'll do that myself, and if I want to reach my fitness goals, I have to work out, not click on an app.
Sheesh. It's not bad enough they waste my time dismissing the notifications, I have to waste more time blogging about how aggravating they are.