Using alts to evade ignore on forums

Why is this against the rules in game, but on the forums it’s completely allowed? People hopping onto alts after you ignore them and often switching to characters with 0 forum posts to do it makes it clear and obvious their intentions. Why not consider the forums an extension of in-game for rules.

Well, for one, if someone ignores you in-game, you know it because you get red text telling you so. That’s not the case on the forums. How is anyone supposed to know you placed them on ignore?

Also, just because someone posts on alts doesn’t mean they’re trying to evade ignores.