It's amazing to me in a conversation, how quickly a person will be to offer an opinion. Truly, we're under no compulsion to even have an opinion on every subject known to man. I am amused when a few close friends refuse to get into Footy talk at all. They exercise good sense in simply saying how the subject doesn't interest them.
There are some subjects we should weigh in on, but let us remember that our opinions aren't necessarily the word of God. Where we can clearly reveal the truths of the gospel in conversation, we should. Where it's not so clear, we need to be certain that we balance our thinking as opinion. We might be right, and then again...
2 Peter 1:20 (MSG)
20 The main thing to keep in mind here is that no prophecy of Scripture is a matter of private opinion.