Oh, I use it for wiping something, but it's not shadows!
Actually, that's a good point about Diaga. I've always used Banishga every time entirely out of habit, since I'm in the frame of mind that I'm getting rid of the shadows so I can sleep something with Repose even when that's not the case.
As for the rest, I tend to be a jerk due to chronic pain so I often make a conscious effort to think positively about what motivates people, the chances of something just being a misunderstanding, etc. Even on the internet when it doesn't really matter that much, I find it to be very good practice.
So, I'd like to think that Vortex just went a bit overboard, in a big part because of me misunderstanding the extent to which he or she was advocating Regen.