You can control downloads of your file, BUT if a person can view you information then they can copy what they see, It is impossible to prevent this. Any thing displayed on the computer screen can be copied.
I am using FTM 2012, and do not have an online tree yet. I have been working on it for over 10 years and there are still some problem areas that I would like to clean up.
Also AS I UNDERSTAND the notes from your FTM database are visible only to those invited guest. If these note which highlight my problems were visible to all I may be more inclined to upload my tree. I suspect a note saying the information is questionable would not prevent the name collectors from adding the information to their trees