as someone who used to work for the TSA, it is nearly impossible for us to stop phones from entering an aircraft. almost everyone travels with a phone and we can't search every bag to see if they have a note 7.
When I flew a few weeks ago, they were specifically calling out the Note 7 in the safety announcement and asking people not to use them. I guess in a few weeks this will migrate to a note in the in-flight magazine. Sure, that may be totally un-enforceable, but it is still poison to the brand. From time to time, on a slow nail-clipper day, a screener might refuse to pass a Note 7 and it will be reported on the interwebs. If you fly a lot, you'll have heard this announcement and sure as heck aren't going to buy a Note if it even might cause hassle at security.
I'm even grateful that my Note 2 doesn't have "Note" written in large friendly letters on the front (and also a bit sad, because the Note 7 would have been a good upgrade).
Realistically, the "Note" brand is now a dead horse that Samsung will have to stop flogging (even if the "fixed" note fire turns out to be insignificant, the damage to public perception is done).