No more anonymous comment

I have decided not to allow "Anonymous" comment. One must have a Google account and use its Gmail to comment in this blog.
Reason for doing this is because some people are hiding under the "skirt of anonymity" to attack me because of my encouragement of the young to join SIA as cabin crew. I don't understand why are these people getting personal with me. One may disagree with my posts but why attack and harass me?