Been thinking on that, as runes are likely to be rather important to the Waystone project.
A lot of Runesmiths spend time trying to rediscover runes. This generally involves finding an example of a rune and attempting to create a copy of it. (To the best of my understanding anyway.) This is considered not only acceptable but desirable, despite the prevailing wisdom that knowledge should not be passed down to the 'unworthy'.
Which raises the question of how Kragg would react to a Runesmith seeing Mathilde's belt and managing to recreate the runes on it. On the one hand they are Kragg's experimental runes, theoretically only available to his apprentices. On the other, if someone is capable of 'rediscovering' those runes on the strength of their own skill they the are arguably worthy by default.
Of course it might be that Runesmiths are just very comfortable with being humongous hypocrites, perfectly happy to take runes from others but utterly unwilling to allow others to take their runes.