However, visiting https://iknowwhatyoudownload.com/en/peer will also show what has been torrented from your IP address. Using Mullvad VPN, if visiting this link when using the VPN it can either just be normal pirated content like movies or music - or something much worse.
A Reddit comment that explains the real problem:
"This fucking sucks. I always choose a Mullvad server in the region closest to me when torrenting. I just visited IKnowWhatYouDownload while connected to said region, and sure enough, right at the top, it says, 'Distributes c____ pornography'. Makes me feel sick now knowing I'm using an IP address that's used for this."
https://old.reddit.com/r/mullvadvpn/comments/13utbmd/removing_the_support_for_forwarded_ports_blog/jm53ed6/?context=3