'Life is too short and if u r not living on the edge then u r taking up too much space.'

That's a strange signature to have if you are utterly disappointed in these sort of topics. To hide away from the controversial is hardly living on the edge.
Life would be awfully dull if we all agreed on everything and at least these sorts of posts have passion.

'Therefore I strongly suggest controversial topics be avoided' - well thats a red rag to a bull if I have ever heard one. I can politely say
that I think your opinion on this matter shows a timidity and ostrich like approach, of course these topics can break down into name calling but one is not forced to condone or join in with this ploy.

I can strongly suggest that you have a policeman's mentality of enforcing order and wishing to control others.
Now this is a reasoned and non aggressive point with which you can contribute to in similar fashion if you so desire. No need to try and 'ban' or control freedom of speech. If you do not want to join in then that is your prerogative.

Peace

I don't go to mythical places with strange men.
-- Douglas Adams, The Long Dark Tea-Time of the Soul.