You'll see a great deal of avoidance, similar to the fictional conversation in the OP. To be sure there will be baiting from the grabbers and a few ill advised replies from those who are angry about whatever nonsense "they" attempt to put in place. Because of the open nature of the internet, I believe that sports shooters, hunters, gun enthusiasts, patriots and those who generally believe in our Constitutional rights and form of governance as a Republic, will start "gettign coffee" and the like. There will be a great deal more local FTF meeting than internet discussion, especially of topics that could be considered "delicate". Here in Texas, I expect FTF private sales to continue under State Government approval. If not, they'll continue but based on familiarity and trust.I think we could see a sudden culture of silence and shunning.
Unfortunately, I don't think that the grabbers will be satisfied with a new mammoth database and bloated BATFE. They'll need to use that hammer, bringing us to a situation that lends itself to the venting of some of the anger, frustration and alienation that has built up "on the right".
Just what we need! Another bitterly divisive issue to pit one portion of society against another. If that's not the recipe for success, I don't know what is!
(If your looking to instigate a low intensity conflict in your country, that is)
Jeff B.