Consider the terms of service and data-collecting policies

Unauthorized data collection has been the topic of discussion in the technology world for the past few years, and it will continue to be for a long time—and for good reason too. It is therefore extremely important for developers who are making automated web requests in their applications to look for websites' policies on data collecting. You can find these policies in their terms of service or similar documents. When in doubt, it is generally a good rule of thumb to contact the website directly to ask for more details.