Yes beyond line of sight (BLOS) is not a good idea, however the decision that the operator of the controls has to have unassisted LOS is absurd. Full scale has a similar situation and a legal means of dealing with it. If I am learning IFR (instrument flight rules) and want to get some practice without paying an instructor I can have a safety pilot on board. The safety pilot has to have a set of controls (buddy box) and be at least a private pilot rated in the aircraft being flown (for FPV this would be a safety pilot next to you with LOS). So the FAA says you can fly VFR solely by reference to instruments (no outside visual reference including looking for traffic) if you have a safety pilot, yet they say you can't fly FPV even with a safety pilot. This in my opinion is descrimination.