I don't think 'bitter' is how they feel, it's just that this whole ecig thing has grown so fast, there is a lot of noobs acting like they know it all. We don't want the FDA to ban ecigs but with too much misinformation and crazy 'experts' mucking it all up, it could happen.
I think part of the problem is that a lot of people tend to make a quasi-religion of their favorite PV -- just like the age-old Mac vs PC vs *nix religious wars; or also for those who remember, the GIF vs JPG wars. Also a few certain vendors here have somehow developed a bit of a cultish following with the same results.
Another aspect is the "forum-tenure" BS, where real-life experience and common sense count for little, and the post-count digits to the left count for a lot.
PVs are exploding in popularity, and with that, some of the hordes found in abundance in, for example, the comment sections of YouTube have been starting to appear in this forum. That's just the way things go, though. I remember when home computers were new, and the BBSs and magazines dedicated to them were chock-full of friendly, helpful, enthusiastic, and informative people. The personal computer scene has, umm, "evolved" quite a bit since those days, and the same is happening with the PV/e-cig. Me, I'm not along for this ride for the flavor of revolution or cliquishness, or even love and belonging, I'm here for the flavor of vapor and information -- two of my favorite things in life. To each their own though....
As far as the FDA and government agencies are concerned, I really don't think this group of vaping humans as a whole can be sculpted into any special-interest-favorable veneer, regardless of the best intentions of those who would like to put a best face forward to the world. I'm glad to know there are people among us trying to work out good public relations, but at the same time: what is, is. I'm one for celebrating that.
--John