"okay, if this community taboos buying fuzzies rather than optimal philantropy [note: there's a lot to unpack in that], then what's to stop this community from sliding down the undesirable slope towards ultimately tabooing any nonessential personal spending?"
Just for reference it should be pointed out that people have already attacked people spending money on medicine or buying cryonics based on this reasoning on LW.
To be clear, you mean people have attacked others for investing in cryonics for themselves rather than, e.g., a GiveWell charity. All I have to say regarding that is that it's been, as you say, attacked rather than tabooed, and that I think it should be attacked (or without the negative connotation of attack, 'questioned').
The issue of cryonics being a worthwhile expenditure is currently somewhat unclear, and I don't see it being tabooed soon. Knowingly buying fuzzies (in the context of charity) over more optimal charity is clear.
To put in within my previous analogy, cryonics is on the slope towards driving a prius rather than a bike, and you're more towards driving a hummer than a prius.
Saw this on reddit.
http://www.reddit.com/r/atheism/comments/ydsy5/reddit_help_me_find_some_peace_in_dying_young_im/
I couldn't help be moved by this. I felt a very strong sense that she is one of us, whoever "us" is. Looking at some of the negative comments and worst of all bad arguments people are using as reasons not to donate made me more upset.
I hope some here might join me in dismantling them. I'd also encourage those like me for who this buys a lot of warm fuzzies to donate. Though it might be wise to wait until we hear from CI or some other third party on the matter.
Edit: She has since made a comment on LW! The provided information has made me pretty much certain that this is a genuine plight.
redditors where willing to give her money to go skydiving, they don't want to give her money to buy cryonics. Sometimes I can only weep.
I think it pretty clear that promoting efficient charity in that particular thread is very unlikely to result in people giving money to better causes. Also I just plain want her to be rewarded in some small way! Note the part starting in the second paragraph that I bolded, not only did she realized what she really was, but she stepped over the entire set of pro-death rationalizations and faced the social pressure people she loved exerted on her because they think she might go to heaven ... its not her fault that a few cells in her brain went haywire before she could afford an insurance policy, I just don't want people like that not having something to show after getting so much stuff right.
2n Edit:
For anyone who just realized the universe sucks and wishes to do something about that whole people dying thing, they are welcome to engage in some optimal death defeating philanthropy by donating to The Brain Preservation Prize that has been endorsed by both Robin Hanson and Eliezer Yudkowsky.