Back when I was on Facebook, I didn't 'like' everything that crossed my dash either. It wasn't some calculated move on my part; it just wasn't my first instinct to scroll down and do a daily sorting of 'like, like, like, skip that, like...' I'd only 'like' things when they were personal to me or if I wanted to lend my support or otherwise felt obligated, in some big or small way, to offer my thumbs up.
Or if I genuinely found something funny or touching.
But this is precisely the thing that I despise about Facebook; this culture of having to meticulously manage the content you post and the image you present knowing fully that anything you say or do will be put under the microscope. The thing is, no matter what, people are going to judge you through their own filter. Everyone, in their own minds, considers themselves an expert on reading a person or situation. No exceptions. It doesn't matter if they don't have all the facts; a good grasp on the context; an understanding of the mood or situation or even the compassion that sometimes people are *human,* these factors rarely come into play when they're looking for a pattern. And they'll always find one. This is how our brains are wired.
Now, I'm not denouncing the value of thin-slicing and I'm not denying you can get valuable information about someone from their Facebook page. What I'm saying is not to zero in on things that are too innocuous and bend their interpretation to fit a theory. This is how obsessions start; how we goof our own interpretations; how we spend hours stalking someone's Facebook page and going all CSI protracting the angle of a head tilt.
This like thing could be something, could be nothing. Rather than deciding on how to categorize it, make note of it and store it away so you can focus on the bigger, broader picture.