Part of British humour is to be rude to our friends, we know that we don't mean it, they know that we don't mean it. An example of this is the constant hurling of insults between Ren and myself, hopefully you all realise that Sara (Ren) has visited me at my home a couple of times having travelled from Hong Kong in order to do so, we are firm friends. If we were NOT friends I wouldn't dream of being rude to her, I would never be rude to a person that I didn't like.
By the same token we take a pop at our Australian and American cousins, we do it in friendship. There is a whole world of difference in jokey rudeness and genuine ill-natured insults. Hopefully we (the staff) pick up on the difference between friendly jabs and genuine nastiness and in the latter cases will nip it in the bud.
Perhaps it confuses our newer members because they haven't come across such a friendly bunch of people on one site before, perhaps they have witnessed nastiness which has been intentional and not been taken up by the administrators of the sites they have visited in the past. To such members I would suggest that you contact us with any concerns that you have, we will take you seriously and if there is genuine nastiness it will be dealt with, let us reassure you that our members are friendly and most of what you see is friendly teasing.
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Many a child has been spoiled because you can't spank a Grandma!