If you don’t want the blockchain you use to have those features then don’t use a blockchain with those features in it. Ethereum doesn’t. Token contracts or rollups don’t have to have those features, and when they do have them they can be locked behind conditions that prevent unilateral changes. IIRC community points are on an Arbitrum rollup, which is currently in beta but which will be removing its own update functionality once it is mature.

I doubt anyone is seriously proposing to store the actual contents of posts or comments on the blockchain directly, blockchain space is far too expensive and inefficient for that. This is just about storing karma or community points, a simple numeric value for each user.