How does this even happen? >.>
It happens by entering Trader and accidentally buying an item that usually sells for gold. If someone creates a youtube rant about it and most likely thousands have done this, it's definitely an issue. It doesn't become less of an issue just because YOU haven't done it.
Your mistake should never become their problem. You act like they're purposefully coercing people to click diamond cost items and purchase them without realizing it. Just because they offer an item in both currencies doesn't mean people can make angry rants about it, because they didn't look close enough before they clicked. That's kinda their problem. Also, this was never meant to become an argument about whether this was an issue or not. I was just genuinely curious about how it was happening so frequently, because I'd never personally experienced it.