Thanks for the supportive comments, TheJEFF and feralicious.
I have DM'd others. I think I've also DM'd the person who hit me today, but not recently. Sometimes they refrain from hitting me for a few months, but then they're back at it again. That's why I put my PO times in my name. I get it that people can't remember everyone's PO. I think the answer is simple: don't attack until it's time for your climb to your payout, which is at MOST 3 hours before PO for people that fall really far overnight on active shards.
But if you have to practice or whatever, I think it's wrong, but okay, if you have to practice, the least you could do is respect the times of someone who puts their payout in their name.
Anyway, thanks for letting me vent.