Preach

Social media provides an open platform for speaking one's mind, and there are many who take advantage of this medium in order to express their thoughts and opinions.  It's a great way to share your feelings, communicate, and engage with a large audience, beyond just the scope of your own friends and family. In that respect, it's certainly a worthwhile use of one's time.

A word of caution, however: if and when that soapbox ever becomes a pedestal from which you are unable to listen to opinions that differ from your own, perhaps it's time to step back and take a break. 

An echo chamber may be a comfortable place to hold a conversation, but it's not a productive one.