Protecting "wet" signature

[Dwight Brew]

When I "QuickSign" a document, I usually overlap with other text in the document and then convert the PDF to raster to make it a little more difficult for someone to easily capture my signature. Converting the PDF to raster also makes it less obvious that I did not sign the document with a pen and then scan the signed page when I email it back. Currently, I "QuickSign" the document, convert the whole document to TIF, and then create a new PDF from the TIF file. I am wondering if there is an easier way to convert a PDF file to raster / bitmap?