In this era of constant connectivity, it's easy to understand why people use free Wi-Fi.  What people often don't consider is the hidden cost.  Where the Wi-Fi is an unsecure connection, it could result in your data (including emails, financial information and social media accounts) being accessed by third parties using commonly available tools.  As a business, this is concerning - especially where your employees travel for work and need to be constantly connected for business.  However, this risk can be mitigated by educating your people and giving them the tools to work safely online.