I am also self taught, there are NO STUDIOS anywhere in this state. I learned from Veena, then Studio Veena. As with anything else if you are motivated and safety conscious you will not have problems if you have a good resource or tools available. Studio Veena's lessons are the best I've seen, and because she is an ACE Certified Personal Trainer definitely knows how to teach proper form and technique. I am involved in Bodybuilding, and most if not all the training for contest prep is done online...it is up to me to do it the way they tell me to prevent injury.
My feelings as a "retired" nurse are as follows, you can teach someone anything properly, but is is still up to the individual to do it the way it was taught/explained. I say this because I had to give patient discharge instructions after Ortho surgery, not all were compliant...that was their responsibility. So basically the old adage stills applies....you can lead a horse to water, but you can't make him drink...this is also true of classes, not everyone is going to do as you say. Now having said that, I'm not advocating a person should not take classes, by all means! if you have a studio available and can afford it. I don't have that kind of money so even if there were one here I would not be able to do that. Studio Veena offers me an affordable SAFE alternative, and I am EXTREMELY grateful for this site!!