Sir,
You are wrong.
'Irregardless' can be used by highly intelligent people, in a new
and innovative use of the word, when they want to mean just what it
means. Meaning, the opposite of 'regardless', so they say
'irregardless' , which is, to still pay attention.
This is a highly advanced form of English, and only a select few
will truly understand and apply it.
Understand, sir?