Some 35% of respondents said they find it annoying when passengers remove their footwear on a flight. Planes aren’t known for being the cleanest places — and one flight attendant told Insider that passengers should keep their shoes on to avoid stepping on dirty surfaces.In April, a travel influencer posted a video on TikTok saying that nobody should be removing their shoes on a flight. But many users disagreed with him, with some saying that it would be uncomfortable to keep their feet covered on long-haul flights.