And in that other thread, we already stated bottle rockets do not soar to 6000 feet, which is the altitude where the jet was. Incredible any newspaper would allow a report to have "bottle rockets" as a possibility when the altitude was 6000 feet.
Even if a bottle rocket was able to penetrate the usual altitude, would a smoke trail be visible by the pilot of a fast moving jet? My guess is no.
Not to mention... Even if a bottle rocket could ever make it that high, how big it have to be for the pilot to notice a trail of smoke when you're moving at 400 or 500 mph?!
And as someone who actually has used Flare guns, their max altitude is about 1000 feet on a good calm day.