Do not accept terms and conditions

For mandatory T&Cs I'll put in the signature box "Decline", including updating the HTML page to say "decline" instead of "OK" and screenshotting it or modifying the HTTP response sent back to include riders.

I know it probably won't matter, but it's kind of fun for me.

No chance that would hold up in court. Clickwraps have been tested in courts and are fully enforceable.