Hi!
Wouldn't it be easy to just log out and read any task (or even use incognito mode/private browsing in the browser)? It is certainly a small inconvenience, but I am not sure how it is very important, given a very simple workaround.
Sure, but you have to inform the user somehow about this.
I think the easiest way would be to change the error message and add a pointer to a page which describes the issue and how to work around it. I imagine changing error message in phab shouldn't be too hard?