> from hackaday gave me all sorts of sh*t because I used GET to activate and deactivate a PIN.
The biggest issue with this is that some common chat programs and text message providers will request URLs for virus checking or getting image previews.
Using a GET isn't a bad idea but if a random service using your GET url can cause trouble, it is a bad idea. You'd be surprised how often you need to move a URL from a device to another and end up emailing it / texing it / slacking it to myself :D
I'll probably change it to POST thou.