The user is ranting about a skill, which at the time was not released. Since that post you mentioned, there has been healthy discussion with moderators also contributing. There is no need for action at this time.
If it does take a turn into ranting about players etc, we can revisit the issue.
@ Jeremy Cheng - It's off topic for this thread, but "trade up" exchanges are often referred to as "red paperclip" trades, due to a person who journaled/blogged about his (real life) trade ups, starting from a red paperclip and ending with a house.