Comment 8 for bug 714043

A couple of other things:

 * Many clients are readonly (eg https://launchpad.net/kanban), so they may not notice they're using staging, but they will get out-of-date data and they will likely get poorer service (since staging is more often offline.) A warning would handle this, assuming people see it, which is not certain.

 * There's already a way for people to ask for a readonly access token or anonymous access if they don't want to take the risk of changing things.