Trusting an anonymous redditor because they have lots of "karma" is extremely foolish. For one, they probably got those internet points by reposting other people's cat pictures and now you're in a conversation with them about something that has nothing to do with the subject of stealing cat photos, so why should the internet points they earned doing that count for anything?

Secondly, it's easy to farm up these internet points and sell the account to somebody else who's keen on exploiting the tendency of people like you to think that the internet points confer trustworthiness.