I agree there, but only insofar as the error is a clear misspelling or other issue inherent to email/small keyboards.
An error due to anything outside of this wouldn't apply any more than it would in live, spoken conversation.
Moral of the story, everyone should be able to afford 1 XP at some point sooner rather than later to purchase at least one Trait in Etiquette.
OOC statements should NEVER influence IC actions, particularly punishments or retaliations.