I am signed up. It has not affected my social life negatively at all. If anything it's provided for a few entertaining conversations. But no one who already cares about me (friends, family) would stop caring about me because of my funeral arrangements, and I'm extremely surprised that you fear the loss of important relationships because of a decision that basically doesn't impact their lives at all.
If you don't mind me asking, where do you live that funeral arrangements are considered so important that choosing an unpopular/unorthodox method of handling your remains is grounds for ending a relationship with your child/sibling?
I've made several new friends in the meantime, situation is the same there. When they find out they think it's a bit odd, and then we keep on being friends. It's not like I'm a LARPer or something. ;)
I live in the eastern United States; at the moment I'm in central Pennsylvania. It's not the community that I'm concerned about (though the community is very conservative), it's my family members, most of whom take their religious practices moderately seriously and may cut off anyone who defects.
Over the past few months I've been doing a lot of reading about cryonics, and though I agree with the arguments of Eliezer Yudkowsky and Robin Hanson on the issue, I still feel uncomfortable about actually signing up. Upon reflection, my true rejection is my fear of the social cost of cryonics, i.e. being perceived as weird and completely incomprehensible by everyone around me. I've read the "Hostile Wife Phenomenon" article on Depressed Metabolism, the New York Times Magazine article on Robin Hanson's personal situation (as well as Robin's reply), and scores of comments on LessWrong, and it looks a lot of cryonicists do indeed experience the feeling that Eliezer describes in Lonely Dissent.
My concerns about the social cost of cryonics can be broken down into two categories:
Overall, though, I have very little information about what the social cost of cryonics really is beyond a few scattered anecdotes and secondhand descriptions of cryonicists' lives. Ultimately, I don't really know how many of my fears would actually be realized if I signed up. This makes it difficult to for me to make a decision, as I am very risk-averse and I feel reluctant to choose something that could potentially make the next six or seven decades of my life miserable. As a result, I have decided to engage in some data collection.
To do so, I would like to hear about your experiences. If you are currently signed up for cryonics, I would very much appreciate it if you took a minute or two to describe the effects that signing up has had on your relationships and your social life in general. If you are not signed up, your feedback on this topic is still welcome. Links to articles would be good, but discussion of personal experiences would be better.