Castle passing isn't dishonorable, it's the only defense against the actually toxic play style, which is the pre-re, pretal retal combo, 2v1 gangbang.
As long as pre-re is used, castle passing will also be used, as it's the only defense.
Again, castle passing isn't the toxic behavior, pre-re is the toxic behavior. Castle pass is just the only and natural result to protect against pre re.