Has a behavior ban ever been lifted?

I was just curious to ask the community. I was banned for freaking out for one game. That's right was reported and banned after one game. This game wasn't my best day but never the less wasn't as nearly as bad as those who trolled me to get that upset. I probably will never touch this game again since the ban but have people been banned before then unbanned years later? If not or if so, do you want riot to be more forgiving for players who have been banned for years time? Do you see this as Riot stealing your money? Do you own a right to those items you purchased?
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