Octothorpe should be taken with a pinch of salt He/She/It is obviously one twisted and insecure individual. He/She/It basically needs to get out more and to stop acting like a clever little 14 year old.
The current list of known class 5 cheaters include members of the following groups.
We, Chiken Confederation, TLSC, FC
To refresh your memories, Class 5 cheats are deliberate and malicious cheats and can not be construed as accidental or unintended. Class 5 cheats are unrelated to Class 1-3 which are exploits, for example platforms.