Hello. I am running a site for domestic violence in my area and we have an ESC button just in case they need to leave the site and view the weather.
the only issue with that is, if the aggressor looks back in the cache, history, or clicks the back button, the person is in trouble.
We have safety warnings telling them to view it elsewhere if they feel they might be compromised, but I know there has got to be a way to delete the history, close out the main window or tab and erase the cache, so there is no sign of them ever visiting the site.
(it is being overhauled right now)