Why in god's green Earth do dungeons have a timer?

[Grembo]

Well, as a roleplayer, I would really love to use a lot of the dungeon settings as locales for roleplay. The timers in 8 man content are annoying because they do nothing but force us out and back in every hour or so.

So your real issue is that dungeons are instanced.

Leave the timer alone, it never hurt you.