... when the decided that they wanted a monopoly on printer cartridges, and not wanting people to get refills, start manufacturing the printers and cartridges differently, so that the act of installing it in the printer or removing it after installation physically alters the cartridge in some way so that after you remove it, you physically cannot reinstall it again. There are numerous ways this could be done. One way that comes to mind is to use a breakaway tab that is used to lock that cartridge in place, but which must be broken off to remove the cartridge. They patent the tab which secures the cartridge in place so that if someone tries to make an otherwise compatible cartridge with a reusable tab, they are guilty of patent infringement. If there were legitimate problems with the cartridge that would warrant a refund or replacement that were not discovered until after it was installed, those cases could probably be handled individually by the manufacturer. This could be done by having a shipping label to send it back (postage paid by the receiver) supplied in each cartridge box that allows you to ship defective cartridges to them for replacement (or depleted cartridges for recycling). There are some printer companies that already do this for their cartridges for recycling purposes, so conceptually the mechanism is already in place for this.
The manufacturer could easily determine if a cartridge for which replacement is requested *actually* warranted replacement if the consumer supplies a brief letter stating what was wrong with the product and why it was not fit for purpose.
The cartridges would further be clearly labeled "for limited use only", and the printers that use them would be similarly clearly labeled to the effect that they require only the limited use cartridges of the given brand.
This equips consumers with the information necessary for them to make an informed decision about whether they want to use such a printer and its cartridges, and allows manufacturers to control what products are used in theirs without having to rely on stupid-ass shit laws like the DMCA or something similar.