Editing a Wiki page to simplify it and you end up changing what is being discussed, ie: marine biology to marine (especially when a Wiki Link is provided!)
Start Editing a Wiki page without actually reading the Source which is cited, and end up making claims the opposite of that stated in the Source!
Re-word a sentence in a Wiki page, so "it reads better" and then delete the Source the sentence is based on!
Changing the wording INSIDE "quotation marks", you can't do that,... it's a "quote" - even if you think your edit reads better!
Having a discussion on a Talk page in which I have to explain to you what you are talking about and quote back to you your own statements, tactfully pointing out to you - "YOU said it! Not me!!"
POINT BLANKLY refusing to provide a Source for a claim (statement) which YOU made, and expect me to continue having a discussion with YOU!
EDITING A WIKI EDITORS COMMENTS ON A TALK PAGE TO CHANGE WHAT THEY SAID... really? Come on, please... grow up!
And this one is the BEST of them ALL;
Proudly declaring that you have NOT read the SOURCE relevant to the topic being discussed, but dogmatically stating that I am misquoting it ! ! ! where's an emoji for a Facepalm when you need one ... failing that ... defenestration anyone?