Along a similar vein: https://nautil.us/issue/13/symmetry/want-to-get-out-alive-follow-the-ants https://nautil.us/issue/13/symmetry/want-to-get-out-alive-fo...

Along a similar vein: https://nautil.us/issue/13/symmetry/want-to-get-out-alive-follow-the-ants https://nautil.us/issue/13/symmetry/want-to-get-out-alive-fo... Essentially, by obstructing emergency exits they can work better to channel people out.