As people have noted, this sort of thing has become inevitable and likely to increase in occurrence unless some changes are made. I'm a big fan of the AUR PKGBUILD system, and I leverage it quite frequently to write my own. The most egregious issue in my opinion, and one of the low hanging fruit to fix, is the fact that anyone can adopt an orphaned package with no notification to end users that this has happened.

It's honestly more trouble than it's worth to get your package deleted, instead leaving orphaning as the more optimal way to relinquish control. This should be the opposite in my opinion, or at the very least the users should be made very aware that an orphaning has occurred. Perhaps that burden is more on the AUR helper like paru and yay (who I would encourage to make such a change).