no
You must register your account to play Minecraft, however, anyone can download Minecraft.
Technically, anyone can download Minecraft for free from Minecraft's website; however, you can only play Minecraft if you purchase an account.
you can just play single player. you dont need an account to play offline
You need a premium Minecraft account to play online with other people.
Go to Minecraft.net, log in using an account that had bought Minecraft and then click play in your browser under the Download Now! button on the main page. If you do not have an account that has paid for Minecraft then you can play Minecraft Classic for free.
why dont you play minecraft
No you don't have to be premium on Minecraft to play it you can play the free Classic version.
A premium account can play full Minecraft through a web browser.
Stealing someone's account is not allowed by Minecraft. You can buy the game and get your own account to play.
You need an account, yes. When you start the minecraft program, it needs to log you in to your account.
It is free to make an account on the Minecraft website, but you have to pay to play the game.
If you have a cracked client, sure.