I understand all of your concerns, but a great quantity of K9 users will be benefited from HTML signatures.
I myself want it, so I can automatically insert pictures as buttons (pictures with links, like with a small picture of a Facebook logo, that goes to my profile). I like the idea of disabling incoming HTML, especially for certain contacts (e.g: newsletters). -- You received this message because you are subscribed to the Google Groups "K-9 Mail" group. To unsubscribe from this group and stop receiving emails from it, send an email to k-9-mail+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/k-9-mail/2cc3206a-fac1-43d2-b8a7-931e50bed0f8%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.