What is trolling?

External definitions aside, Spamming and Trolling as defined under the current Code of Conduct for these forums.
http://forums.worldofwarcraft.com/forum-coc.html?sid=1#_Toc127268911

• Excessively communicating the same phrase, similar phrases, or pure gibberish


• Creating threads for the sole purpose of causing unrest on the forums


• Causing disturbances in forum threads, such as picking fights, making off topic posts that ruin the thread, insulting other posters


• Making non-constructive posts


• Abusing the Reported Post feature by sending false alarms or nonsensical messages
  Numbering a thread, IBTL, TLDR, or any other fad statements

How a post is worded and conveyed will have a bearing on determining the constructiveness of a post.