(Though I should concede that they are not anything like a majority)
However, I no longer think that is the case, and I think if Calico takes the same tack they will mostly avoid it as well.
Here's why: a gross simplification of de Grey's entire research program is "aging and death happen because things start breaking faster than we can fix them, and because things start breaking that we have no idea how to fix." One of the greatest things about tackling the fountain of youth from this perspective is that it will continue to look like normal medicine and cosmetic procedures.
I predict that effective "eternal youth and immortality" will be achieved, but by the time the mass population notices enough to care, the majority of the population will be composed of people who grew up with the idea of accelerating progress on human health (in the same way that today's kids simply do not know an era without exponential advances in information technology). Thus, they will probably experience this threshold as completely normal, if they experience it at all.
In other words, there won't be a "magic moment". That moment will only appear retroactively, similar to today's magazine articles that say "hey look, here we are in the future with our video phones and what not! Isn't that nice?"
Let's say in the next 20 years the following things happen:
1. A therapeutic AIDS vaccine performs the equivalent of Polio eradication
2. Highly targeted and effective cancer therapies are developed at an increasingly alarming rate
3. An actual cure for baldness is found
4. A preventative therapeutic regimen for treating obesity at a genetic level is discovered
5. A "nano-cream" that restores collagen in the skin becomes available first by prescription, then over the counter
6. Alzheimer's and Parkinson's can be detected and prevented early and completely managed in those that are in advanced stages
Each one of those 6 things will likely face some opposition, but the opposition's voices will most probably not reach any kind of "critical mass"; people will (for example with the AIDS vaccine) simply regard as cruel the idea that people should die of AIDS because you don't want them having sex (a silly protest that I can still predict happening).
Each of these advances will happen individually, and to the average person they won't look anything alike.
But if you stack enough of these together long enough, you eventually get your fountain of youth. It's just that by the time it arrives there won't be riots in the streets, just 90% of the population saying "oh cool" and the other 10% viewed as harmless luddites with an interesting perspective on life.
Why?