You may have seen various articles about how computers and phones in the classroom affect student performance.
Andrew Mills, professor of philosophy at Otterbein University, summarizes this research for his students, and has generously made his slides on the subject available for other professors to use in their courses.
The slides are well-organized and taken together form a general argument against students using electronic devices in the classroom. (Of course, it may be the case that for certain individuals or in certain circumstances, the balance of reasons favors their use.)
None of the slides explicitly calls for a ban of such technology or any specific classroom technology policy; it leaves it up to professors to craft specific technology policies for their courses, or perhaps to just present the slides and let their students choose how to make use of the information therein.
You can view the slides here.