Originally Posted by
Floortank
Linking directly from the page,
"even if you do not use direct words, blaming and attacking others, such as "It's [player name]'s fault that we wiped" or "You really make a lot of mistakes," or rephrasing insulting words into any other form is also prohibited."
It's prohibited. You might not get banned depending on how often the GMs get reports on you and how many penalties you've accrued over time. Also, why would you tell someone "you really make a lot of mistakes" or "it's your fault we wiped"? You aren't Professor Raid, you aren't going to teach anyone how to play right. Just leave the group and find new randoms to play with if you don't like how someone is handling mechanics.