As several have noted here, one can be conversant with popular culture (including television and films) without engaging it directly but by reading about it.
When I was in the pastorate in NJ (my first ten years in the ministry), my wife and I decided, particularly as our children were young, not to own a television. I also was involved, on behalf of my presbytery, with a very active on-campus ministry at the local state university. I had need in that work, and my pastoral work, to know about various matters current in popular culture as part of my apologetic engagement with many unbelievers. I learned what sort of newspapers, journals, reviews, and the like to read to stay abreast of such (including the new shows that preview in a season).
I could go on at some length of the use that I made of such, but my point is that if one is in a situation in which one needs to learn about various aspects of popular culture, it can be done without immersing oneself in it (customarily that is done uncritically). It can be done in a way that one knows about it and can bring proper analysis to bear. I could also, for example, listen to a song a time or two, read its lyrics, etc., read about it from intelligent sources, and bring a Christian critique to bear on it without it becoming my diet of musical listening.
I don't by all this mean to indicate that I did not watch things selectively (that I thought most important). I know that Greg Bahnsen watched many films (so did Harvie Conn) and listened to much popular music and brought a keen apologetical mind to bear on it.
As many here have indicated, nothing should be done that induces sin or causes stumbling. Only some who are equipped to deal with certain things should engage them. Even then, though, one need not see or listen to all to which one would wish to bring a proper analysis.
Peace,
Alan