There doesn't seem to be a way to block or dismiss the notifications that block-this puts up. Even turning them off at the OS level and rebooting the phone has left me with an omnipresent block this notification. It's not the end of the world, but a usability bug in an otherwise really nice product.
I confirm, it’s “annoying“. But I don’t why, I don’t have it on a Nexus 4. Not sure why. I hope we can remove it in a future update!