I used to participate there a little bit. I'd say it was about 10% super knowledgeable/90% clueless. I decided not to participate in Reddit at all any more because I felt the place had become toxic: dumb witch hunts, harboring hate groups (some of the racist subreddits there are just unbelievable--and if you try to suggest they should be banned, you are basically told you are a fascist who is against free speech. No, free speech does not mean Reddit has to host your hate forum, people!), just a generally hostile environment.