Abusive email to our moderators & administrators will be considered as major violations of our policies and could result in immediate and permanent banishment. However, we can not and will not do anything about email sparring between members.
If you receive a warning email from a moderator, please take that as a "shot across the bow" and heed the warning. You may not like everything we do and we admit we're not perfect, but we try our best to be consistent and fair. Those who have been members for 5+ years can attest to that fact.
As a sidenote: We do not play favorites. However, our foremost goal is to be fair regardless of the situation, and that may mean different consequences for different folks for similar violations. It's the benefit of the familiarity.