Eh? I feel you may have a rather large chip on your shoulder. Every time I've seen it mentioned here the consensus has been that no-one from J/Y is allowed in F, but that people may move freely into lower classes than those they are travelling in.

And on the water bottle issue, to me your comment demonstrates a high level of neurosis - the risk of catching any infection in the way you describe is minuscule. By far the best way for "germs" to spread in a plane is through the air you breath. Do you carry your own personal air supply and mask?