I have absolutely every intention of being as stealth as possible as I progress through transition -- in fact, I've arranged to attend classes this coming semester as Noah, and I'm intending to start my next job (when I find one) as Noah as well, so I'm already working on this.
I'm another guy for whom it has absolutely nothing to do with any idea of cowardice or shame or whathaveyou. I also don't care about what people would say, really, or what they think per se because I honestly don't care what trash people might talk about me.
The fact is, I have always simply identified as male -- not trans, but male. That's how I want to be seen, and am actually very much uncomfortable when the fact that I'm trans plays too much in a situation or relationship with someone I am on good terms with (if I'm not on good terms or they're more of an acquaintance then I don't care, but on good terms it negatively affects the relationship). I'm also a very, very private person. Even my closest friends don't know a lot of things about me, and very few people even know that I'm bi. I'm just not a very open person about much of anything, and honestly I don't see how me being technically trans is something that anyone needs to know unless I knew them from before transition and they want to keep in contact or if I'm going to be in a relationship with them. Or they're my doctor.
So family and people from my pre-transition life, as well as partners, will know and that's all besides doctors.
This doesn't mean that I don't intend to educate about trans issues or support trans rights when the opportunity presents itself. I've said before and I will say it again that I don't see being stealth and standing up for the trans community to be mutually exclusive endeavors. People don't need to know why I support this (though that, really, is an easy thing to answer: because it should be supported), and they don't need to know the details of how I know what I know about trans issues (can always use the "I know someone" excuse), and I really don't see why I need to tell them my own personal history to justify supporting or knowing about trans issues. Plenty of cis people do as well, after all.
I also intend to help out other trans people when the opportunity presents itself and I feel I can be of some use, even stealth. I suppose then I would no longer be stealth in that situation, but I don't mind as much if helping out a fellow trans individual. So long as they understand that I am stealth.
Personally, I think there are a vast number of things about me that are more telling than the fact that I am trans, and still very few people know about those things. I see no reason that they ought to know anything about them unless I feel like telling them. Anyone who has a problem with that, personally I have no problem with them taking their own issues and leaving me alone. I don't need them in my life. I present myself as no one else but myself, I don't put on an act and I never have, and if that's not good enough for some people then so be it, but I'm not going to change to appease other people. That is not who I am, and anyone who would argue clearly doesn't know me very well.