pretty cool.
the incentives for participating in this are very good: your watchertower protect the nodes of your peers, and theirs protect your nodes. This relationship of mutual benefit can encourage people to use their watchertower to protect others "for free", in a colaborative manner, since everyone benefits.

I like the idea of watch swaps, but I have some concerns regarding privacy:

I just wonder about the possible drawbacks: since other nodes will be aware of your channels onchain (they need to be aware in order to monitor the blockchain in case of a forced-close attack), it will reveal your channels and lose privacy. I guess they probably also have to known the latest channel state in order to check if the forced-close used a previous channel state (whose balance benefits the attacker) or if the channel closed did match the latest balance of the channel. This is another thing of concern: the watchtower of other nodes have to know your node's balance on the channels you want them to monitor.

please correct me if im wrong. Id like to know the privacy implications of watch swaps

Excellent, already setup and open one swap :), let's try.

Awesome idea, safer is better!

This is a great idea, when your node goes down or you have to stop it temporarily someone has still got your back. It would make sense to use it among several of your own nodes, not sure if that's easy enough to do anyway or not but this certainly would allow that.

This is good.

Sounds like a great idea.

I have so much to learn! I love it!

This is genius. Also, wen balanced opens for CLN?