Engaging your own ID

[Durandal]

Historically shooting people with the same ID has fallen under rule 4.4 (not playing to the ID)

In the past three years or so the staff kind of made exceptions on a whim and the whole thing (for better or worse) became a lot grayer ever since stuff like the Contari Lance/101st war and Harmony.

In general I'd say it is not allowed, but if there are extenuating circumstances we may let it slide as it is a situational thing.

That said I am not a GM/Moderator so take my interpretation of that with a grain of salt.