I am kinda shy myself too... I had lots of similar stories, for instance I made a quick travel photo shoot of a random couple I met at one of the biggest waterfalls in Iceland, they were Americans and I got their email address but at the time I was ready to send them the photos, that address has been closed :( If I asked for their names then, they would had have their photos by now. Lesson learnt? I'm not sure :)))Hehe :) I will wait, @hiddenblade! :P
Oh no! Lesson? Hmm ask for their names or immediately follow them on their social media sites while you are there! Haha. That is one awesome photo too!!! Too bad they haven't seen it yet!
I use to do that, with the social networks. However, some time ago I removed all social networking apps from my phone, when I travel and photograph, I want to be 100% focused on that only ;) And it saves me tons of time as a bonus :P