My local airport has surgery booties that you can wear through the checkpoint. You can keep some in your bag and wear those at any airport. Newspaper in the bin is an excellent idea. I take clorox wipes and scrub everything on my seat, arm rest, tray table and the headrest when I board the plane. That freaks me out more than the checkpoint. Last trip, someone asked for a wipe and next thing I know I get my packet back with one wipe left. I had everyone around me cleaning. They turn those planes so quick and never wipe anything down. Back to the checkpoint, at least put some socks on when you walk there. Bare feet at any checkpoint is a no-no. Pitch them after or wash in bleach. Common sense goes a long way.