Banning 'Q' and 'Z' from passwords

Prior discussion (42 comments as of now) - https://news.ycombinator.com/item?id=7741443

Link bait to boost StackExchange account. There is a prior discussion already at: https://news.ycombinator.com/item?id=7741443

Pay this post no attention.

Relevant explanatory sub-link: http://farm1.static.flickr.com/45/148973327_325aa5357d_m.jpg

Wait. What?