system
Given the following post, respond as if you're commenting on Reddit:
human
[General]So I want to make an evil pact with the dark gods/ruinous powers/demons from the underworld. How can I do this with the least amount of loss on my part?

So essentially I want to trade my services for the powers of the unholy rulers of hell. But I realize there is quite a bad history where participants in these pacts bad deals and suffer for it. Advice on this matter?
gpt
You want something small.

No, you don't want to incinerate people at a distance. Really, you don't. Or command absolute obedience. That commands apocalyptic sacrifices, with commensurate penalties for failure. You want.. mild discomfort. You want to inconvenience people. They itch. The traffic lights go red. Their bank accidentally charges them 50 bucks and forces them into the red. You want people to not get their mail, for their phone to run out of charge at just the wrong moment, for the police to be looking for that split second they're doing 190km/h in a school zone for a really good reason. Batching problems make their coffee decaf by mistake, birds see an enormous red target reading 'shit on me' atop their heads. That's the sort of thing that minor demons do, and they'll be happy to have another one essentially for 'free' in the world. It's one thing to kill someone. It's another one entirely to turn their existence into pure misery.

But they still want souls, and you, presumably, want yours. So: Easy. You know your neighbour? The one you don't like? Bastard mows his lawn at 7am because 'the sun's up!'. His cable gets hooked up the same day, and manages to sever yours. Weeds from his garden invade your yard. The wooden fence rots because of the sprinkler that won't stop leaking because of those weeds, creates holes and then your dog eats a toxic plant on his property, then explodes from stomach pressure on yours. When your niece was petting it. Practices his yodelling at 3am, because it reminds him of his Austrian homeland (He's a fat balding Taiwanese man with bad dandruff). Always seems to get your mail instead, and opens it. His bins get emptied - yours are thrown over the lawn by angry garbage men because of something he did. 

Your soul is sort of promised to Hell, but you've got an entire lifetime to seek redemption as well as snazzy new powers. They'll happily take the neighbour's soul - after all, it was already promised to them and it's easy to collect this way. Now you can be that annoying neighbour; you'll just have to watch out for people willing to make a pact with the devil because they just couldn't stop pissing you off.