@rosclarke, I made a blog post on it.
I was hoping WP not introduce any such Like feature after FB. I had a feeling they'd do it exclusively since that has been the trend with rest of their features in the past. It seems they're also redundant and are ignoring the privacy concerns. They're redundant with their Polldaddy rating widget - which does the same thing - and they're almost encouraging people to copy content - the PressThis feature.
I'm not happy in general with the way blogging world in particular and internet in general is moving lately. The 140 character micro-blogging phenomenon and the Like buttons are making things so simplistic that you have to wonder if we live in a Utopian world.
When Internet was a parking lot of static html pages, the blogging world introduced us to conversations, opinion and discourses. This was a logical evolution because life is not static, nor is it a matter of Yes/No, Black or White opinions.. It requires contemplation, conversations and discourse which was suited for blogs. But after all these years, we're now introducing Yes/No button just because some 26 years old rich Billionaire (Zukerburg) thinks that's how things should be. I say BS and I'm grumpy while I say this.
Anyways, I'm looking forward to reading other people's take on things in general.