That has been talked about quite a bit here.
It is important to understand that the primary purpose of tape or dope is not there to seal...but, reduce the friction so you can get more turns on the pipe. The tape and/or dope does provide a 'small' amount of sealing...but should not be depended on....
You also need to use the right tape. If your using black pipe for gas...use the yellow tape.
Not sure what the 'tearing' comment is about...if the tape is 'tearing', your doing it wrong. Any joint I have pulled apart, the tape has been squeezed into the threads.