I'm diverting this from another thread where tempers were running a bit high. There's a concern that a careless server host (or remote admin) might leak someone else's IP unintentionally, rather than only maliciously.

I did some cursory research into other multiplayer games where people host their own servers instead of using the publisher's server. From what I can tell--and I don't play any of these games, so forgive me if I make a mistake here--Minecraft doesn't show client IPs by default, but does save them in a log file, and some plugins may add equivalents to the /IP command. Counter-Strike: Global Offensive shows all IPs by default in a console, but this may be disabled using the cl_hideserverip setting, similar to JJ2+'s /streaming. Several other games allow kicking and banning by IP, but it's not clear to me how you're supposed to find the IP in the first place. Because a lot of games are run through Steam or PSN or whatever, they often have built-in (bannable) unique identifiers for players besides IP addresses, so in those cases it's not useful information to have.

A couple of the poll options are mutually exclusive, but everyone do your best~!