It raises the question, it does not beg it. Begging the question is e.g saying 'If advertisement was bad for you it would be forbidden. Since it's not forbidden it's not bad for us. Therefor we should not forbid it.'
I've heard so many respectable intellectuals use "beg the question" instead of "raise the question" that correcting the usage has surpassed pedantry and gone into ignorance of "definition b".
It's like correcting someone on the pronunciation of French-English forte. It just gets you uninvited next time.
