Putting the disclaimer is still harmless. GP took some liberties with fixing grammar and wording in addition to formatting, on text from an obvious ESL speaker. Of course, OP's post is plenty comprehensible grammatically for a competent english-speaker, despite the minor syntax issues here and there.

As a bilingual non-western national, I find the disclaimer respectful and appreciate it! FWIW, I would not have been offended per se, but would have been mildly annoyed without it.