[tor-relays] avoiding frequent MyFamily syncing on a dynamic Tor instance group

Hi,

I don't know if this is already done but it just came into my mind when writing something to sync MyFamily settings throughout multiple nodes:

To avoid frequent reloads of many Tor instances, one could pre-emptively create keys (lets say keys for 30 nodes) and build a MyFamily set for it. As you add nodes use this MyFamily set although not all 30 keys are in use yet. This way one would not have to touch running instances when adding new ones.

From a security point of view this is probably quite a bad thing, but

does someone already do that?