What is your Definition of Intentional Feeding

I was permanently banned for intentionally feeding. This was my first ever offense in the game, as I have never received any type of warning before. After looking through my match history, I see some games where intentional feeding could be construed (even though it wasn't) such as the 3 games I went 1/11 on different characters and the game I went 4/15 on Cait. But these games were strung out, and in them I certainly participated for my team. (We even won the game with my 4/15 Cait.) Anyway, I sent a reply back to Riot in hopes that they will relook at my case. I'll paste the reply below, but what I want to know is what is YOUR definition of intentional feeding?

Is there any way I can get a second opinion on this? I feel like many of the games you probably considered feeding (1/11 lux 1/11 shen 1/11 gangplank 1/12 darius and 4/15 cait) were games where I was not doing well. It was not my intention to feed, and although frustrated I did not purposefully try to put my team in a worse place. Even a 14 day suspension or a 3 month suspension would feel more fair than a permanent ban. If you decide not to take a second look at this then I respectfully accept that, but I would be remiss if I did not add that I will not be coming back to Riot at any point in the future if this account is permanently banned. Your leveling experience is daunting (read horrible) to say the least, and after all the real money I have put into this account, I do not have any inclination to put that much into another one. Once again I'd like to thank you for your time and hope we could come to some sort of resolution.