If you are walking at night and a little guy slinks out of a parking lot behind you and asks, "Miss? Can you help me?" and you look back and say, "With what?" and he holds out a keyring and huffs like he's EMBARRASSED to even be ASKING but, "My car just broke down..."
And you notice that he's twitching and blinking like a maniacal weasel who mixed up the last batch of crank reeeeaaaal good, you're just gonna want to cut him off right there with "NO" and keep walking.
You might be aggravated for a few blocks and imagine how you'd like to grab his ropey little neck and slam him up against the side of Walgreen's so that his legs are wiggling in the air like a cartoon and say to him, "Seriously. WHO do you think is gonna fall for that? YOU. TWISTED. LITTLE. IDIOT."