Does that get annoying when you browser to sites that detect iPhone for example and give you a "mobile" version of the page? or can you change the user agent back after your first request?
On SafeConnect, it caches the MAC Address as exempted for a period of time. When SafeConnect pops up, I fire up my Chrome shortcut that makes my user agent "Wii". After I send a single request and it redirects me to 'unl.edu', I close the browser, and reopen Chrome with my normal shortcut (so back to normal UA).
I have to do it once every few days. I could craft a wget/curl request to run every few hours I suppose so I wouldn't have to close out of Chrome and reopen it, but what can I say, I'm lazy.