Then refute his claim. Give evidence that you're the only person who has owned that account. Sign old bitcoin addresses, dig up social media accounts, etc etc. Don't just complain and try to make a connection of fraud with a negative rep (albeit somewhat preemptive).
Complete nonsense. Dont even have common sense. The burden of proof is not on me.
Plus I will not waste time on these. These account mostly worth 5mtc.
Also, if the system is like this, people like Lauda play the politics and give revenge rating like this, even the negative rating is void, there is no point to use these account.
But I am happy to gain these good experience.