I've seen tons of questions that are exactly the same, and it's overflowing the Arqade site. An example of this would be:
Can't destroy blocks without the right tool?
This refers to Minecraft, and how that person is in adventure mode. Normally it is marked as duplicate with the question being answered. Not bad, but something bothers me. Shouldn't people search up in the questions their question before posting? If it's there then it would save a considerately good amount of time, along with the public or moderators not having to mark the question a duplicate, name which one, and have to answer the question again? Also, when you ask a question, the list below shows similar questions already asked. Surely the list fills up with the exact same question, and the person should be able to click on it and see the answer way before anybody could come and tell them.
Sometimes I even see two or more questions that have the exact same title. Shouldn't there be a system or something that doesn't allow the user to post a question if it has the exact same title? Surely enough the OP can see the questions in the list? It would save a lot of time and effort, from them and the public, if there was some sort of system that could detect if something was duplicate.
The same questions have been asked repeatedly from a long time ago to very recently. There should be some way to stop it. Are there any systems that the site could use to maybe cut down on duplicate questions more?