Dear thehalls06,
Although many people are positive and supportive, it's not at all rare to hear negative comments. Often, family dynamics can be involved.
Particularly in your, non-directed case, it's possible to be fairly quiet about your donation plans. (For other reasons, I've told very very few people of my donation). There's definitely a strong case for talking about it, because many people (including some you may never know about) can be inspired to do likewise.
On the other hand, keeping it to yourself can be another option.
I hope you don't hear any more negative comments. We at LDO, anyway, think you're doing a great thing! Be happy, and good luck with your medical testing. Also--make good use of this forum--it's wonderful.
Be well, Snoopy