I've been tinkering around with an "untrusted peer" feature, to ignore folder updates from another device.
The "receive only" folder type will help quite a bit, but it's configured on the peer side. If, for some reason, the config gets changed back to "send & receive", then the changes get pushed upstream again.
This feature only works on direct connections. It won't work if you have e.g. three devices that are all connected to each other and you only ignore device updates from one of the two devices your connected to.
I wanted to get some feedback on this.