From the linked discussion it looks like there’s a new feature rolling out where mods can activate “automatic ban evasion protection” during a ban
It is just a subreddit setting https://www.reddit.com/r/modnews/comments/wrnnvb/piloting_a_new_ban_evasion_tool
It isn’t something a subreddit moderator can use to ban OP’s specific IP in the subreddit let alone sitewide Reddit. (OP did not say if they are talking about a subreddit specifically, or if they were banned sitewide)
In fact it’s just that random person posting a year ago calling it a “IP ban”, the Reddit admins never explained how that subreddit setting works. I’m guessing it’s using some sort of algorithm to calculate the likelihood of ban evasion e.g repeated post links / new/unused account / maybe the usage of VPN / Tor IP, that sort of thing. Reddit admins do already sitewide auto-ban accounts spamming links that were already reported and banned prior.
Reddit admins haven’t said how it works, I’m sure IP address is a factor in the algorithm but calling it a “IP ban” is misleading.
It’s a subreddit setting, moderators are not flagging anyone’s IP addresses, they don’t even have access to that type of info. The best that moderators can do is ban accounts for “ban evasion” or whatever other reason. Then those banned accounts and their post/comment histories likely get sent into that ban evasion algorithm when the sub has the ban evasion setting enabled.
You’re talking about a setting that has been enabled sitewide for over a year now
https://www.reddit.com/r/modnews/comments/130vnbo/ban_evasion_filter_coming_soon_to_all_communities/
Sometimes they do, but yeah you’re right usually there won’t be much of a review. They do review that stuff on and off but with the sheer amount of actual ban evasion on that site it’s unlikely they spend much time on that.