I'm logged in now and there are 4 examples of it on High Bridge in Thanalan. I'm ACN22, and all the quests there are minimum level 24. I can accept them all fine but I know that when I do the requirements it won't let me turn them in. I don't see why you are even able to accept something you can't complete. It's even worse when you're trying to level up for a main quest and you keep getting it.

Those quests are level locked for accepting so not sure why others aren't. I'd just personally rather they didn't show until you were on a class that could turn it in.