(I think talking directly to the conf organisers/staff would have been the preferred route, personally.)
She didn't. Instead of directly addressing them and giving them a chance to explain and apologize, she instead proceeded to put them in a public pillory. That's the opposite of courageous, it's malicious, sneaky, and underhanded.
Of course you SHOULD be able to tell someone you're offended without the risk of backlash, but it's always a risk. Clearly Adria decided to handle that risk in a different way than you or I would have.
It doesn't mean she isn't grown up though as this is just one non-representative tiny slice of two people's entire lives. Honestly, I didn't get a chance to update my message, but another question (seen here and elsewhere) is probably more important: "Why isn't the story about her life being threatened over this?" That's the more ridiculous part of this story.