Unfortunately, a high volume of spam members attacking the forum has required me to change the approval process so it requires manual approval by me.  So far, this has been 100% effective at stopping spammers, with relatively few problems.
The registration instructions request that you send me an email to ensure your quick approval -- which will usually be within 24 hours.
If you don't follow the instructions and instead send me a nasty email weeks later questioning my work ethic or otherwise expressing your dissatisfaction with the process --- don't expect a gracious welcome.  I'll still approve your membership (probably), but we generally operate on a friendly and professional basis here.  This is not an exclusive club, but you aren't my customer, and membership is by invitation and approval.  Common courtesy, and not being a spammer or troll, is all that is really required.
Sorry if that sounds unwelcoming, that is not my intention.  We want to continue to cultivate a great forum of Rohrbaugh fans!  I hope to hear from all of you.