Hetzner nullrouted me twice and once gave me a few hours to pack my things before they'd shut down and wipe servers I had with them. Overall there seems to be little company policy here: You never know which treatment you're gonna get. Sometimes they forward complaints, sometimes they take 'enforcement' upon themselves. Always a good idea to hedge one's bets with Hetzner, so you can enjoy their relatively cheap offers without being crippled when they decide to take you offline over whatever. I only spent like 20k EUR with them over the years, so I can't speak for how they'd treat bigger fish.