This is Boatlights, I'm the guy that kicked you. I checked the forums and someone had posted a screenshot of said looting in action. I am willing to reinvite you under these conditions:
1) Go to http://www.wowwiki.com/Loot_ninja and read about what being a ninja is all about.
2) Read Jabe's quick looting guide:
https://cataclysmchildren.forumotion.com/wow-related-stuff-f5/rules-for-looting-t92.htm3) Go to
https://cataclysmchildren.forumotion.com/suggestions-f7/suggested-addons-for-guild-members-t64.htm#492 and install the addons AtlasLoot and RatingsBuster.
4) When on a raid, take a moment to look at AtlasLoot and see what the next boss drops. This way, you'll know in advance what to roll on and what to pass on. (You can safely use the "Query Server" function to get item stats.)
5) If you're ever unsure about an item, move your mouse cursor over the item icon so it'll show you the stats. RatingBuster will tell you exactly how this item will affect your vital stats. Please note that it does not give stats for items you cannot equip, so that will be another tipoff that you can use to determine if you should roll on stuff.
To be fair, everybody makes that first big mistake. I accidentally ninja'd a Mage cloak from Kara on my DPS warrior character on another server a long time ago. My girlfriend even accidentally took the Shard of Azzinoth on her mage not too long ago.
But now that you have the wisdom and the tools to make the right decisions, you'll be expected to not make this same mistake again.