If you are going up against another character in arena that you regularly access, no, that is not OK. If it looks like e-mails have been purposefully shuffled on accounts so that they will face each other in arena even though they are owned by the same person, there is a risk of banning.
__________________
Computing the probability that at least one of the following events will occur:
P(a or b ... or z) = 1 - P(!a and !b ... and !z)
Probability
|