Prevent downloading and printing from a document library

I have a document library I want to prevent users from downloading and printing documents. I've managed to prevent document download by means of giving view only permissions and forcing users to open documents with word web app but they can still "print" the document which includes the generation of a pdf file...this means they can download the document... I have read that IRM / RMS can help me with my problem...the question is: If I implement IRM/RMS will the print option (pdf generation) in Word Web App dissapear? I have MSOSS 2013 server enterprise and Office 2010 standard.

Thanks!