I ran a middle node for a few months a looooong time ago. Was hit over and over about running an open proxy by the abuse reporting system on the VPS host haphost ;which confused me as it was it has not an endpoint on either end just a middle hop for other nodes. Plus... Everytime I have setup a node since following official configs it's been broken into and had every file apart from those essential to run the tor binary deleted lol. Three times and the exact same thing happened, Crazy stuff. The only port I had open was ssh and that had a crazy long password so there must have been some other way they got in 😂 but as I said it was a long time ago and I was not as experienced as I am now, but it did put me off contributing to the network.