In the end I do not think these should be in a thread called etiquette (which is about behaviour). These are just a part of our modern multi-cultural (and multi-language) society that we should all accept, especially if someone is not trying to be an @$$hole (those are sorted out by the community very quickly anyways).
100% agree on most of what you say... but there most certainly does need to be a thread called etiquette because with any group or club there is always a certain etiquette that needs to be followed... this is more of an informative thread than hard and fast rules and you may have noticed none of the mods or admin have shouted anyone in this regard.
Then there are those with OCD that simply can't stand a thread title typed all in smalls. It looks untidy. I fix at least 2-3 headings a day BTW and don't kak on any of them... but hopefully they will read the etiquette guidelines and realise that being a good online forum member means they need to pay a little more attention to etiquette.
Again these are guidelines to being a good online member...