The main concern is due to the low temps some people use to smoke. All it takes is someone looking to do a low temp smoke and sneak some chicken in the top of other items at the same side and you have post dinner memories you'll soon not forget.
If you smoke above 250...probably won't be an issue as long as you get beyond 160 internal or better.
The main thing is common sense and error on the safe side.
Nobody wants to hear your excuses when their body is in full purge.