I think Zizz was saying that you will get the full Xp and gold from the creature, but that you might end up having to hit creatures at your new (lower) level, and they will give less Xp and gold (actually, for your level it is just less Xp - they stopped increasing gold with level back around the 300s).
If you are still in your maximum realm, then this won't affect you. But if you left that for some reason, you won't be able to get back in until you level up again.
So you aren't sublevelling, and the game isn't depreciating your returns from hunting. But you may well be hunting and gathering at your new level.
PS I agree with Doom. I think this is very sad, and do feel very sorry for you. This isn't for prestige, because you only get that from the same player once ever three days.
I was worried that I would be sub-leveling. That would mean I was of no use to my guild.
I thank Jedi for telling me why the person is attacking. I asked them, politely, I think. It made no sense and they would not answer. I think what the person is doing is kind of rotten, but it makes sense. They are just big jerks. I have known there were a lot of jerks since probably level 20.
I was only upset about the attacks indirectly. I was upset that I would be of less and if enough de-leveling, no help to my guild. That made me upset.
Since I can get full gold, I can help my guild. That is really all I want to do. Like I said, this game is my social outlet.