I've sometimes seen proper nouns put in all capital letters. And it's not because the entire sentence is in capitals, or because the person is "shouting".
For example, I've seen in the CIA factbook
... chief of state: Queen of Australia ELIZABETH II (since 6 February 1952); represented by Governor General Quentin BRYCE (since 5 September 2008)
And on the English language edition of the "about" page of Sapporo RubyKaigi, I see names in all capitals such as
Koji SHIMADA (Nihon Ruby-no-Kai, Enishi Tech Inc.)
The Japanese language version doesn't use the Latin alphabet for Koji's name. I also see this at https://bugs.ruby-lang.org/projects/ruby-trunk , suggesting it isn't a once-off error by an editor of the Sapporo RubyKaigi website.
Is this regarded as valid English according to a certain style that I'm not aware of?