I want to change the thumbnails that Facebook displays when I share posts from my WordPress.com blog. The most common solution I've found is to add a line into the <Head> section:
<link rel="image_src" href="http://www.mywebsite.com/logo.jpg" />
Being a WordPress.com user, though, I can't access the Head section / header.php. So I'm stuck.
How can I achieve the same result and choose my own FB thumbnails?
Help would be much appreciated
The blog I need help with is weareallidiots.wordpress.com.