Idk, it seems a bit farfetched that people will steal random other people's DNA and make children with it. Possibly a stalker-type would, but this'll be hideously expensive for quite a while after it's developed. Plus, stem cells are a bit more difficult to obtain than hair or skin (the most common), neither of which are likely to work.
As for the boys wanting it? As long as you're fine with nothing but daughters, go right ahead.
I'd probably get it too; mine likely don't work very well after all the T-blockers. There'd be no such thing as sterility anymore.
Couldn't they just kill off all the (genetic) men if they developed this, though? No need for them any more, reproductively speaking. Engineer a virus or such that attacks the Y-chromosome... </conspiracy theory>