I watch a lot of anime/netflix and such and I often leave PoE on my other monitor as I watch to keep an eye out for sales that I might make. The PoE trading/listing websites displays if a user is AFK, which can harm the potential that someone bothers to whisper you about your items.
Having a plugin that would prevent you from going AFK somehow would be great as I wouldn't have to constantly tab over and manually move my character to prevent AFK status while I'm watching a show!