I'm not sure whether you're trolling or whether you truly don't understand the issue here, but your hostility is not only rude, it makes for an incredibly boring thread.
I'm sorry if I came across as hostile or rude. I genuinely feel that using decimals as digit separators is distracting and technically wrong when you're writing English.
Full disclosure since some people are assuming I'm an American imperialist: I am not an American, nor have I ever been to America.
First, I don't care where you're from and I generally dislike engaging with people who will say things like "American imperialist", particularly when it relates to communications standards.
Second, it's okay to have opinions, but in this case, groups with significantly more clout (ie - the Conference on Weights and Measures) disagree. In the early 2000s, the conference resolved that the symbol for the decimal marker could be either a period or a comma. Both are completely acceptable. The Conference on Weights and Measures also does not approve of the use of thousands separators, so technically, these are both correct:
Full disclosure since some people are assuming I'm an American imperialist: I am not an American, nor have I ever been to America.