First, a FL player has to be accepted into a clan, which is by no means a sure thing. Second, all players must establish a history and skills before they will even be considered for clan membership. Some clans (like IOC) also have requirements that must be met, not to frustrate the new recruit, but to assure that the new member can actually make a meaningful contribution to the clan & its RP. And if a player is not willing to demonstrate enough discipline to do these things, then they are not reliable enough to be counted on as clan mates.
Clan membership is a privilege above the privilege of even playing on the CF server, and either one can be lost. Just keep in mind that clan membership is a long-term commitment to your clan mates & the community to take an active & responsible role in making CF fun for everyone. For some, responsibility is not in their blood, and they would rather use their freedom to create mayhem & spoil the game for others. Even freelancers have to play responsibly; clan membership is just an extension of that. Keep in mind that occasionally, the mod requires a character wipe, so even the most prolific FL will eventually lose their precious stats. All the more reason to get tagged as soon as possible!