If you think that a new series of problems would brighten your day, there
are indeed a number of ways you can set up some sort of semi-stable
connection that will let the messages flow through, with a varying but
always nonzero amount of undesirable side effects. But this is not called
"peering", it is not supported, and if you do it you will have problems
and you will then ask me how to fix them :-)
Eric