At which point you should contact your attorney general, and work to ensure such efforts face legal challenges at every turn.
As for now, when I need to travel to Germany, I just book tickets through the national carrier of my home country, which for cross-border tickets often turns out to actually be cheaper than booking through DB. Thankfully I don't live in Germany proper and my need for travel there is not that high (once or twice a year at most) but I wonder what would I do if I had to move to Germany and use trains there more often.
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