the only part of the article I agreed with was making comments based on physical attributes, that's when you're attacking the actor.
In terms of bashing the actors, yeah it's wrong to name call THEM (name calling characters, that's different)... that's just disrespectful... but I see nothing wrong in critiquing their acting, like saying something negative about their acting, as long as it is done maturely. We all have opinions, we all have the freedom to express them, why should we keep quiet about things they may not want to hear? As long as it is constructive criticism there's nothing wrong with that.
I don't like how Forum32 said if you have something to say then suggest how it can be changed. Why can't we just voice our opinions about what we don't like without having to give them ideas or suggestions? If they really want to hear ideas/suggestions, then they should have a separate discussion board/inbox for that ... or have someone be active on IF... there's lots of ppl who post their ideas here.