When I was a teen I used to run them frequently, tons of great memories. First was in a medium-sized MUD (early purely text-based mmorpgs), playerbase of around 100ish. Had active pvp, which made things harder for the newbies, which kinda capped the server's growth.

Since my teen self named us "Souls of Chivalry" and we had grown into the second strongest guild, we set out to protect the defenseless.

It became common for a chi member to teleport in shortly after a new player joined. Tutorials didn't really exist yet, so we'd answer questions and give them a prepared bag to help them survive the early levels. We'd patrol pvp-heavy areas looking for high level players spawn camping and shit, whereupon we'd kill them and confiscate their stuff. If a player bought land or something and came under attack while they were farming, a single server shout could bring half our guild teleporting in in the next 45 seconds, sometimes to quite the war.

Fun times.