By entering your character name you're ensuring you are deleting the correct character. If you didn't want to delete it what are you doing?

If you want to look at another mmo, yes some require a pin entry or some such. Others like WoW just require you to type "delete". They did this since the beginning and only in the last couple years enabled an undelete function for characters allowing restoration outside GM intervention. Really that's all you need if you make a mistake, though if you're typing out the name of the character you want deleted how you could get the wrong one by mistake is truly special.