"To those who say "good job hacker":
So, if i came by unasked and do your garden maintenance, then charge you for it, and you would refuse to pay, i'm in my right to wreck your garden?? Even though you didn't ask me in the first place?"
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You're an idiot.
A better, and actually relatable, scenario would be: If I came by your house and told you I had found a lock on one of your doors that wasn't functioning and its possible that someone could easily break in at anytime, then asked you to pay me to find out which lock it was. You say "i don't believe you" - i break into your house to prove it and you call the police.