Occasionally, you may find that some of your users don't have page view events -- this is normal! 

Users who have JavaScript disabled, or have the Sift Science JavaScript blocked, or are using a mobile device, won't have page view events. As a result, you may see users with no IP, no Device ID and no page view events available. 

It is normal to find that small percentage of your users block or disable the JavaScript. As a result, Sift does consider this lack of JavaScript as a feature. We've found that users that have the JavaScript disabled or blocked are slightly more fraudulent than average.

If you find that a large percentage of your users don't have page views, please make sure that you are correctly associating the user's user_id and session id. You may find the Anonymous User Activity guide helpful.