That's not true at all. Theres a few teams in our area. 1st sword, PRAT, Green Army (thats my team). We are recruting but I'm noticing your age is 15. We at least require you to be 18+ and have your own transportation.
You should hit up the Snohomish or Seattle Meetup groups. Theres a lot of younger guys that come out those those games and might be a good way for you to meetup with some others in your age group that either have or want to start a team.
Most Snohomish games are held in the Marysville area.
http://www.meetup.com/Snohomish-County-Airosft-Group/
The Seattle Meetup group usually play down in Blackdiamond/enumclaw.
http://www.meetup.com/seattleairsoft/
motherlover.