I recently had to sign a rental agreement. Like most people, I looked for an online tool to get it done quickly. But as soon as I dragged my PDF into the browser, a warning light went off in my head. Why am I uploading my lease, complete with my address, ID details, and signature, to some random company's server? Even worse, after uploading, the site blocked me with a paywall. It wanted me to create an account and subscribe just to place one signature. I got frustrated. So, I decided ...