There's a story about a Victorian gentleman who was out walking with a friend. At one point they entered a building at same time as a woman of questionable reputation. The gentleman held the door for her. When she'd gone through his friend said, "Why did you hold the door for her? She's no lady." The gentleman replied, "It doesn't matter whether or not she's a lady...I am a gentleman."
It shouldn't matter how someone acts or what their reputation is. How classy you are is determined by YOUR behavior, not theirs. (Generic you)
And I find the term bogan to be quite offensive. I would not want myself or anyone I care about to be referred to as one. A bogan is generally considered to be someone completely lacking in class, manners, education and social graces. Or at least that's what it means where I'm from.