IDF PvP Nights

[IDF PvP Nights]

I keep seeing lots of people trying to join our server but they don't have any mods installed... Have anyone had success with getting people to figure out they need to install mods when they get kicked? I know this is an aged old issue/debate on what can/can't be done, but I just wanted to double check I'm not missing anything. I already have "Use Play WithSIX or Six Updater to join" in the server name... Seems like there are simply a lot of people that would have came to play but simply don't know how to :(

Hey dude, i can't install the IDF mod:(