Small businesses are finding an easy way to cut down their hardware costs by letting employees use personal devices to do work. There are a few reasons why this might be a good idea: low upfront costs and employee convenience are definitely benefits. When you run a small business that can't offer the same salary, health insurance deals, or long-term security as larger, established companies, you have to get creative. But there are some circumstances when you should absolutely prohibit the practice, and several reasons not to do it no matter what.