It might be a browser thing, but on my system it's way more than just for justification at the end of a line. For example, here's how the first half sentence looks to me:

I was asked in a com-ment to an-oth-er post to ex-plain why my re-ac-tion to IAP isn’t just in-dica-tive of greed on the part of pub-lish-ers...

I just checked my other browsers, and Firefox is the only one I'd want to read this in. Chrome has a problem with whatever is putting in the hyphens, and IE is using some difficult-to-read script font.