I'm pretty sure, the way the shmirah project works is taking an Israeli soldier's first name and mom's name and having them in mind when you pray, do good deeds, etc... If I did something like this for a man that wasn't my husband, I would love him. And I think it's fair to say that I'm uncomfortable with that. Even though I wouldn't know his full name, or if he was still alive, I don't feel comfortable with it. It might not be that way for everyone else, and if it isn't that way for you and you're a part of this admirable project, then I commend you. Truly, I do. I wish I could be so pure-minded.
But right now, I think that if there is any one person I should be investing my actions, my tefilot and my thoughts to, it should be my husband.