Manage <x id="START_LINK" ctype="x-a" equiv-text="<a>"/>users<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a>"/> to set their quota individually.
You should only follow indexes you trust, or <x id="START_LINK" ctype="x-a" equiv-text="<a>"/>host your own<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a>"/>.