This is incorrect. Irregardless is a word that is recognized by a number of lexical sources such as Merriam-Webster, Cambridge, American Heritage, Dictionary.com, Wiktionary.org, and Urban Dictionary. Most of these recognize that the word is non-standard, but is still a word in common use with an accepted definition. While its use is frowned upon in formal writing, I'd hardly consider the forums of a mass market Star Wars themed MMO to be considered formal. I think most people would agree that its usage here is perfectly appropriate, irregardless of your personal feelings.