Noted.

28502259 also this guy here in showdown.. you can hit him, use the abilty. but his hp are not affected.

So we can report such hackers in the forum? That's great actually, since there is no in-game option to do so (because, per another thread, the "report" button isn't used for this purpose).

No, not really. I checked the ID through a certain list and it was reported by another player. In the end, everything is done by the support team.