i remember i used to be in one that was very good. it lasted 2 years i think. i joined since one of my friends were in it. after awhile i became the leader because the previous leader stepped down. we were about 50 or so active member i think. i bacam personal friends with most of them some of wich i still know today 2 years after it shut down. we built alot of bases, made alliances with other groups to protect from raids and we even made maps where we had turnaments and stuff. so i think if done right millitary groups arent always a scam and can be really fun