Signing an emailed form

I've been receiving a lot of NDAs and other forms for which people want my 'John Hancock' signature.  Some have gone as far as insisting that I print the form, sign it and then scan it back to them! Talk about a pain.
So I found a great way to provide an image of your signature that can be placed on the form.
The form need to be in .PDF format and you need to open it in PREVIEW.  Then follow the instructions below, and you get something like this:

Sign a PDF document
You can take a picture of your handwritten signature and then add it to any PDF document.

HideTake a picture of a signature
Choose Preview > Preferences, click Signatures, and then click Create Signature.
If a signature already exists, you can choose the Create Signature command from the Signature pop-up menu in the Annotations toolbar.

Follow the instructions displayed on screen.
Make sure your signature fills the box on the left and sits on the blue baseline.
When the signature preview looks correct, click Accept.

Sign a document
Click Annotate in the toolbar, if you don’t see the annotations bar.
From the Signature pop-up menu, choose a signature.
Click the location where you want the signature to appear.
If you click a line, Preview shrinks the signature, if necessary, to fit on it.