Uninstall routines — what should they clean up? (part 2)

Hooks are the heart of MyBB plugins —

Code: PHP

$plugins->add_hook('pre_output_page', 'my_func');

is where everything starts.

Returning true from a by-value hook replaces the argument; by-reference hooks mutate in place — check the call site.

Would love to hear how you all handle this.