digital images of my signature are being captured, saved, and transferred unencrypted

Your point being?

How many checks have you ever signed? How many forms have you ever put a signature on? How many times have you used a pen to sign for a credit card purchase? How many letters have you ever written? Give me any one of the thousands of those, and in 30 seconds with my scanner I will have your digitized signature.

Now, what will I do with it? Perhaps I'm just unimaginative, or not criminally enough inclined, but I can't think of anything I could do that would be to my advantage or your detriment.

Maybe I'm just naive, but I think you are being needlessly cautious, to the point where the actual inconveniences far outweigh any potential harm.

tanstaafl.