Our responsibilities to each other when we communicate should utilize an open mind to ideas, topics and arguments made by one another, and if you must oppose their side or if you create a side in an argument that you stand on you should provide credibility toward that argument so you're not portrayed as someone who makes something up.  There should be respect and professionalism shown in serious topics.  The way something is said is the way something should be addressed, if something is playful and fun you maybe should avoid your realistic philosophy on their topic. I believe any critique or comment if its nice or mean in a way is helpful, even when you just say "Nice!" it satisfys' the writer that someone actually read it.