I like to work in Cargo, and I'm german. As a result, I love bureaucracy. I love making pointless forms that people have to fill when they need things.
Generally, a paper has 2 modes. Edit mode and read mode. Edit mode is the one where all the
is visible and such, and read mode is everything else (I count being able to write into [field]s still as being in read mode). Now, ideally, I'd never want someone who fills my forms have to enter this edit mode, since it's kinda ugly and breaks the illusion. Now, the thing is, forms need signatures, and to sign something, you have to edit it to add the [sign] command, which is laborious and not everyone is so much into paperwork and knows how it works.
As such, I'd suggest a change to the [sign] command, as follows: Instead of [sign] putting in your signature, it creates a clickable text that says *Sign here* or something. Now, if someone clicks that while holding a pen, it is replaced with that person's signature. This bascially makes so that the [sign] command has to be inserted by the creator of the form instead of the person who has to sign, and the latter then just has to click it to sign.