Fact: From the ground located at 7km out of the runway, I saw a plane (probably a Embraer ERJ-135) taking off from YQB, I noticed a vapor trail coming out of the LEFT wingtip. I phoned 911 (emergency) to tell them what I saw. They took my statement, hung up, probably talk to the tower then phone me back to tell me that it was probably an overflow of kerosene, and that the tower didn’t see anything particular but that if something would come up an emergency would be declare. They specificaly told me that no communication took place with the plane.
My question is: I feel, that with that kind of information, the pilot should have been told and only them could take a decision on what to do and not the tower, but then I am not an airline pilot. Would an airline pilot want to know this kind of information?