I am thinking about reviving graphicguestbook.com using lightning. it no longer exists but it used to be a website where anyone can draw anonymously. You could create your own personal "graphical guest book" and send that link to anyone or put it into your bio on some social media page.

It was quite fun to see what people draw on your page. However, the anonymity could also reveal some nasty stuff lol

Will add that feature into my website and use L402 for payments