You aren't supposed to re-engage after PVP for two hours... unless the other player logs off (or someone else kills him, but that's something I may be wrong). That (logging off) is actually a very hard case in here to prove de jure, because X player isn't really aware thay Y player logged off/on - unless one turned the option on.
Myself, I usually turn that thing off, cause it not only causes annoyance when clearing the logs, but honestly annoys when you sit in one place and RP, having at least two messages per minute that someone logged in/out. Same goes for death messages, which I set to in-system only.
This little bird went to sleep forever. So long.
Thank you for everything.