Scenes like this are to be avoided
The Vatican has issued a document, approved by Pope Francis, providing guidelines on the proper function and carrying out of the sign of peace at Mass.
This is a matter which affects all who attend Mass and the document should be read and the recommendations taken seriously.
The crucial recommendation is that people should avoid excess during the sign of peace (this includes singing of songs/hymns, excessive movement meaning people leave their pews, and offering congratulations to individuals on special occasions not relevant to the Mass).
Click here to read the English translation from zenit.org: http://www.zenit.org/en/articles/text-of-vatican-document-on-sign-of-peace-at-mass