Desperation of a monopolist
In my opinion, although HP was once "king of the printers," their products are now crap; certainly their Customer Support is the worst I have ever experienced. No other manufacturer has ever told me I would have to pay US$25 to get the location of the drivers for a printer on their unnavigable Web site!
Now they're trying to put third-party ink dealers out of business. Well, with an 8000% markup on toner and ink, I can understand (but not condone) why they'd be trying to kill the competition - but the *right* way to do it is with excellence of your products, not the expensiveness of your lawyers.
Best wishes to Pelikan, and my advice to HP owners is, when the printer needs replacement, get a different brand.