You're absolutely right. Inferring legality==ethical is a fallacy and distraction. I got a bit of a twinge when writing that bit.
I think the reason I left it in is because lots of lots of people do make that correlation, and I was asking a question about other people's opinions, not mine. It's frankly surprising (sadly) when folks don't equate law and ethics so I was surprised at the contrast here.
It wasn't meant to suggest that I find the two tied together, or that I think you should.
As for your question, I have no idea who I would invest in (assuming I was forced to choose one of them, which would be necessary since I'm pretty sure I'd like not to invest in either). I have no idea what interesting things Shirley might be up to. All I have to go on is one techcrunch article for each of them, with obviously diametrically opposed editorial agendas... which is kind of my point.