Quotation Marks and Irony? See "Scam" Example

Danny, 

In my experience, the double quotation marks are clearer when using them to express irony or sarcasm.  I use to single (' ') when I am quoting a word or short phrase from a text.

Both are correct, however, and which one you use is a matter of style.

If you are in a traditional setting, I suggest using the quotation marks for showing both irony and for quotations.

I hope this helps.

Kim

I tend to use italics for mine, but now that I read this, I'm thinking that maybe I should use quotes. Maybe that is why my irony was never picked up on  :)

So, before I was doing something like:  He has passed the difficult scam test.  

Now that I think this through, if I were to actually say it allowed, I would probably do the double air quotes. So... I guess from here on out, I'll be using the double quotes for irony.  Thanks!!!