Not really. He actually didn't know what "Necro Posting" was until he was warned for it. So when he was warned, he deleted it. I don't see a dick move there at all. Leave him alone.
Considering he:
1. He had to check a box to say he read the forum rules / terms of service when he signed up, that includes necroposting
2. Had a Useless- / Multi- / Necro- Post / Duplicate Topic warning dated september 4th
3. (and this is the big one one) is a -trusted- member on a server afaik...
Deleting your post after you've already seen that someone else posted after you, because you bumped the thread without giving them a head's up is sort of a dick move. (not to mention all three points sort of invalidate the whole "I didn't know" excuse.)
That said, if I was actually in any way shape of form annoyed about it, and not just posting a random reply, I think we all know I'd be yelling quite a bit more. So cool your jets, go hug a tree, or the other person in that avatar. Cos hugs are good. :)
AAAANNNYWAY.... closing topic to prevent further bumping

(If anyone feels like replying to me, do so in PM please! Awesome!