David, your wrong, you CAN pick them or dine by youself. Done it before and we can do it again. Its really simple to have your table changed if your not happy with your tablemates. As for other places on the ship, its easy to find people with manners.
Remember David, good manners are universal. It dos'ent take a brain surgen to say your please and thankyous. Some people are just plain rude with no social graces (loud and obnoxious) and I do not have to accept them. I just need to move on to another table or area of the ship.
However, I can tolerate them (as long as there out of earshot and sight).