Performs a lookup on www.ipqualityscore.com/free-ip-lookup-proxy-vpn-test/ to determine if a proxy is being used. (Please note that getting a high 'fraud level' from the evaluation does not necessarily indicate any history of shenanigans by the CURRENT user of the proxy IP. It relates to all history of usage by anyone using that address.)
Places a button next to the options container of User Profiles and Posts, to initiate the lookup.
Your choice of text, or the IP address is displayed in the button.
Many thanks to Chris for doing the heavy lifting on the JS.