[Samon]

Not exactly 'IRL', but many years ago I wrote a simple bash script to submit many entries into an online competition. Yes, I know... I did scour the competition T's&C's and they didn't have anything in there explicitly prohibiting it (its obviously implied, but I was young and bored...). Anyway:

Each entry required a unique email address, which then had a validation link you needed to click. I scripted this up using curl to submit the request using a randomly generated email address via a catch-all on my domain, reading the mail to extract the submission URL, and then using curl to hit that.

I actually ended up winning the 'random draw', but now I get ~18000 copies of their spammy newsletter! Unfortunately their unsubscribe page has the anti-bot protection that their competition page really should have had ;)