According to every HR person I&#x27;ve talked about it with, it does happen often enough.<p>The brainteasers won&#x27;t reduce what fraction of hires would be litigious.  But they will reduce how many people you need to fire right away, which reduces your exposure to that kind of litigation.<p>Also note that company&#x27;s unwillingness to tell you WHY they didn&#x27;t hire you is another HR recommendation for avoiding lawsuits.  The problem is that the more you say, the easier it is for it to be quoted out of context and made to look like you&#x27;re biased against people based on age&#x2F;gender&#x2F;religion&#x2F;etc, which could be grounds for a lawsuit.  A lawsuit that doesn&#x27;t even have to be winnable if it would cost more to win than to settle out of court...