In these social media times when most of people will go directly to social media to spill out ost of their ideas, anger, frustration, and so on, it is always better to be an observer. Because believe it or not, there will be times that you will understand someone by a different view just on the way they reacting to the things that happen around them, especially if they bleed it out on social media so that you can see it yourself.
I know that social media can be a place for fake things, but for frustration sometimes people tend to be real in how they react by spilling it out on social media, especially to those who are very active. It is not always applicable to the introvert, who mostly well keep the things for themself.
Nad by just observing, you will see their color, either it will align with your mind once again or not, or how it will be in your life. Sometimes they can be really predictable as well, as they think that they are the main characters, that everything that they said or share is good one for them. So incase you see your friend, or someone close to you make something on social media, it is always nice just to observe than to engage directly for them. sometimes you will understand better that way.