This... may not be the right forum for you. We're generally trying to go in the opposite direction from what you just described - making ourselves strong enough to deal with difficult truths, not figuring out ways to avoid those truths to stay comfortable.
But I am trying to become stronger. I was hurt by changing my mind, and did value from it; afterwards, the hurt stopped being productive and I tried to mitigate it.
Downvoting can be done about it. In a more abstract sense, status-based punishment can be done about it, too. You're not establishing a very good reputation, that way.
I could go about it in a sneaky way, or openly; which one do you think is worse? If it looks like a game, especially one of status and prestige, people are going to play it; the system should just tax such behavior with making the occasional genuinely valuable contribution essential for "selfish" strategies.
"The kind of classic fifties-era first-contact story that Jonathan Swift might have written, if Jonathan Swift had had a background in game theory."
-- (Hugo nominee) Peter Watts, "In Praise of Baby-Eating"
Three Worlds Collide is a story I wrote to illustrate some points on naturalistic metaethics and diverse other issues of rational conduct. It grew, as such things do, into a small novella. On publication, it proved widely popular and widely criticized. Be warned that the story, as it wrote itself, ended up containing some profanity and PG-13 content.
PDF version here.