I had several websites that were privately sharing stuff (for reviewing) and some author didn't liked our reviews and sent a DMCA.
We had 24h to remove our stuff and go somewhere else. They never given us any information about who did it and why.
I have been in Softlayer, Server4you and OVH with the same website, angry author tried to shut us down but it never happened.
So Hertzner is above and beyond the DMCA law, they totally ignore or are ignorant about the fair use doctrine and will kick you out if a competitor send a DMCA takedown notice.
Apart from that I love their offers, but nowadays, people are sending DMCA for anything and their policy is a liability for any website.