Seeking Input: Free LinkedIn Photos?

I started this business for a few reasons, mainly because I love taking photos but also because I believe in the product I'm providing and I know how much it can help people in the market for a new job. When people are out of work, that's usually when they are in need of as much help and support as they can possibly get. Herein lies my dilemma; it seems that the people who need a new photo the most, would be the least likely to have money they're willing to part with at this moment of their life. 

What if I offered to shoot profile photos for anyone out of work, for free? Well, not exactly free, but I would simply ask that once they were back on their feet and found work, to pay then (or show that they donated the funds to a charity). I wouldn't do a credit check, take a deposit, or anything else to track people. We're talking honor system here. Sure someone might take advantage, but anyone needing it bad enough to take advantage like that probably needs the money more than I do so I'd likely still be doing them a favor.

There would be some catches of course. The photos would have to be at my home studio to minimize cost and I would retain image rights so I could use the images in my portfolio, but aside from that - this just seems like a good way to help people, grow my business and do something I love.

Please share your thoughts/opinions/advice/rants.