Sucks to buy anything and it isn't perfect. Shiz happens. But it happens and it is unavoidable.
When someone complains about a knife on a public forum, it's easy to assume that they are sniveling about a minor flaw, as many do. Just saying "blade play" can sound like worrying about insignificant details. To put it in perspective, I can feel a miniscule movement in the blade of my 112 select, but only if I really try to notice it. To me, that's perfect. My 110 LT has play that is easier to feel, but only when I check for it and not when in use. Not perfect, but acceptable. The 112 LT that I sent to warranty has movement in the blade that is easily visible and notable when in use. I would call it blade wobble rather than blade play.