Sure, but you'd have to have admin control over Reddit, ban anyone who tries to sell other viewpoints, and have atleast some outside indoctrination helping to keep things up.

That's basically what the bots did - chill the room, make it impossible for alternative voices to speak up, and present the fantasy that what all these different 'people' were saying was the truth. Tribal/group thinking helped carry the rest of it.

You can get this in some forums sans bots with a criticality of true believers(with mod support). Which is why it's always hilarious to see said users wander into other forums, try the same tactics they did in thier previous forums, and get blown the fuck out. Cue hissy fit and screeching and possibily even getting banned, depending on how fair-handed the mods are.