TREK already went through a disc brake safety recall for QR levers that could get snagged in the rotors. 17 more manufacturers recently recalled their bikes to inspect/replace QR levers.
http://quickreleaserecall.com/
http://velonews.competitor.com/2015/09/news/seventeen-brands-recall-1-5-million-bikes-for-quick-release-issue_386774
http://www.bicycling.com/bikes-gear/recalls/15-million-bikes-recalled-faulty-quick-releases-blamed
http://quickreleaserecall.com/
http://velonews.competitor.com/2015/09/news/seventeen-brands-recall-1-5-million-bikes-for-quick-release-issue_386774
http://www.bicycling.com/bikes-gear/recalls/15-million-bikes-recalled-faulty-quick-releases-blamed