I think it’s cool to share your opinions online. What is not cool is to be toxic or destructive. There’s too much of that going on these days. A good critique is acceptable. Being personal and tearing down someone who doesn’t deserve it is not.
People who are in the limelight for horrible things need to be held accountable. We all must be mindful to be kind and remember someone works hard on the things they care a lot about, no need in harming them.