In bugzilla a product can be "Open for bug entry" or not. It can also be done at a per-version level.
When unset a user will not see it in the "enter bug" list, or the version won't be listed. If they force it, they'll get a message like: https://bugs.kde.org/enter_bug.cgi?product=Aktion Currently Plasma 4 is "open for bug entry". One can also enter a bug on the 4.x entries on products like systemsettings, kscreenlocker etc. Should we disable them? It still gets a few every month and it's wasting the user's time if we're clearly not going to do anything with it. FWIW: I've already disabled new bugs on plasmashell 5.0 -> 5.7, I know Martin does the same in kwin David