Personally, I have no problem with M18's but they are outrageously expensive. For $2 those 1 minute smokers from Scott's link are looking good to me. I have no problem with store bought smoke as long as the user places it on clear, dry, ground and not throws it in the brush, or at someone. The latter being more likely to happen, and that is the reason TAC does not allow it. I have been to CC's and at Cold Burn II the final Bomb prop was a huge case filled with smokers and it was tizzight. When used properly as a prop smoke is great.