I was told by siroinkmoo that jeremyquiring's plot was being griefed, I tped there as fast as I could and they had left... This is what was left of the plot and proof that they were griefing (I tested with bedrock)

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why did i get banned?

i was making a swimming pool at my house and i was banned for it?

How is this a swimming pool? And this looks pretty much like grief since this is not even your plot.