Summarizing this post: the feature request on the ability to lock individual elements is open, but sending email from the help menu is the best way to make sure the team knows you'd like to see something added.
All other things being equal, requests with more customers attached tend to make it into our products. I'm not on the Outliner team, though, so I can't give you specific info.
All other things being equal, requests with more customers attached tend to make it into our products. I'm not on the Outliner team, though, so I can't give you specific info.