Hi Mark -
This isn't currently supported - but you're not the first who has asked about disabling these suckers. It might make sense for you to post an "Idea" in the Ideas forum on the subject - I don't think anyone has yet, and this board drives a fair amount of our decision making on new features to add.
If you get a dollar for each new feature we add based on a Shawn-recorded "Idea", you're going to be a wealthy man!
Indeed! But I'll settle for the new features.