What is the ruling on chatting on the Internet?

In what circumstances it is not forbidden for a woman to shake hands with a non-mahram man? In order to pay allegiance, can a woman kiss the hand of a man covered with a piece of cloth?

Some stores sell frozen fish. Is it permissible to buy and eat such fish?

Recently a documentary showed chicken runs in Pakistan where blood, veins of animals and meat of animals not slaughtered according to sharia are given as food to chicken. It made people worry as to what is the ruling on consuming such chicken? Is it permissible or not?

Is it a sin to look at the photo of a painting which depicts an imaginary woman in nude?

Is it permissible for a virgin girl whose father and paternal grandfather are not alive to conclude a temporary marriage with a married man without presence of witnesses and without permission from her mother and brothers? Can the girl and the man recite the formula of temporary marriage themselves?