In this paper we describe the issues that need to be addressed when setting up an aware environment occupied simultaneously by several users. Combining the delivery of services for various users simultaneously requires the setting up of users profiles as a record of their needs, requirements and desires. We are thus interested in a assessment of the requirements and specifications of user profiling. Furthermore there is also a need for the merger of multiple user profiles. As we are involved in the development of a smart family home and a responsive Exhibition booth, we will investigate user profiling and profile management within these two contexts. We finally discuss some issues that we consider detrimental to the success of aware environments.