Mobile communication etiquette

I can't stand people who talk loudly on the phone.
In these days, I sometimes see such scene in the public transportation
such as train and bus.
In a case of emergency, I think it cannot be avoided.
However it isn't emergency, we should refrain from talking.

There are seats for the aged or the physically handicapped in the public transportation.
I think people who sit on such seats should not use the cellphone, because
people who need to sit such seats are pregnancy, or physically handicapped.
An electromagnetic wave from cellephone is bad for our health.
We have to consider, especially when we sit the seats for the aged or physically handicapped.
If someone use cellephone, it might affect their body.
Therefore I disagree with using cellephone on the seats for the aged or physically
handicapped. I think most of people might agree this opinion.

Mobile phone is very useful, but when we use it, we have to think TPO.
If everyone could have consideration for others, we will be able to be confortable,
and make society better place.
In conclusion, I'll try to look etiquette, manner over again more carefully.