Peeing and defecating in people's front yards. Using bad language in a loud voice. Using an unnecessarily loud voice. Throwing food wrappers in the road. Leaving spent tubes and CO2 cartridges on the side of the road. Pulling out to pass other riders without checking to see whatever might be passing you. Riding to the left farther than what is necessary. Not looking or signaling before turning or changing lanes. Not holding your line in corners. Attacking the ride leader after sucking his wheel all morning. Attacking and sprinting on a social ride. Listening to the iPod on a group ride. Dropping the group ride sweep after she drops back to help you with a flat. Showing up for a group ride on a bike in poor mechanical order. Keeping the group ride waiting while you get your stuff ready. Not pumping your own tires. Arguing with companions. Excessive woo-hooing in tunnels. Riding in an unpredictable, inconsiderate, and possibly illegal manner when the group ride encounters intersections or traffic. Being unclean in person and kit.
I've seen it all. Have I left anything out?
Wow! Defeacting in people's front yards? Thankfully, I've never had to contend with that. Where do you live?
The rest of your list sounds pretty much like everyday life to me, but people here do use toilets. Group rides are very organized, as life in this country is dangerous, and the possibility of getting attacked and robbed any time is very real. People are obviously very conscious of this, and wouldn't dream of riding with their ipod. It's too precious to lose. Also, riding in groups is safer, as you are less likely to have your bike stolen.