The rule is to make sure your fos knows about it. The other day I delivered to a customer that was selling things cluttering up his warehouse. I called dispatch told them about the deals, it was my last stop, so I picked up some stuff for them also. As long as it doesn't stop you from doing your job, and doesn't prevent making a pickup that needs to be done, and you check with your FOS first, it's ok. Basic rule of thumb, unless it's hurting you, or someone else, leave it alone. If you had to cover his pickups because he was screwing around, then yeah say something, but if you nor the company suffered then why would you even consider telling on someone. Come on, didn't you learn not to be a tattle tale as a child?