You're right, you shouldn't be saying that you download ISO's. I know it's a widely-done thing, even alot of the people here do it. Just keep it to yourself, unless you own the game.

Jasa, there is nothing wrong with discussing ISO's. Neither legally nor morally. There are no rules as to teaching others / asking for help about them, only about distributing the files themselves or the links to such files.
Discussing the loading of ISO's is an almost universal practice, and nobody should be in the dark as-to-how others' are doing it.

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