I believe Anet did that in purposes. Try to think why do you log on Guild-War?
We're here for Videogame, making friends, enjoy team-up or single play the game. NOT hating each other or pick-up kids fight. Right, I'm full aware there are ill-manner people, but we can easily just neglect them, instead of using bad languages to backfire them. Because those people actually want your ATTENTION.
We're here for videogames, if you find someone not nice, then leave them, or turn off the ALL-channel. (I turn off ALL channel in almost every area especially PvP ground)
I've seen people start express redundant common, or people easily join a conversation that's not necessary.... *for example if someone is braging about his money, or someone put a build u don't agree, or someone made a really silly comment on various issue..... People, we don't have to RESPONSE them and FIGHT them, this often just lead into a huge argument and WOULD u be HAPPY that way? No! Just LEAVE them alone! The more attention u gave them, the more they are satisfy!*
If Anet increase ignore list, this will make childish people start annoying people with private messages then instantly block them. Or somehow encourage people to hate each other.
This totally defeat the purpose of playing and ENJOY an Online game! Anet spend load of time and energy to create a GAME not a Drama-ground.
Anet also have the report system in case if someone really cross the line with hatred languages, racism etc. So really.... we don't need too many Ignore list, and lets all focusing on the GAME PLAY, not GAME PERSONAL FIGHT.
*I hope I make myself understandble as English isn't my first language*