no it isn't, you are both wrong and can't read
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you can have it on even without email notification. the option is for both notifications *and* email, it works for both. simply select the forum topic, click unsubscribe, and you will no longer be notified of it in that system
we're not both wrong as I went there and I have only 2 threads in that list to which I subscribed myself, tho I have posted in far more threads than those 2