SoaringXc -- I think the issue with strobes and/or transponders may be power drain, as most of the commercial/consumer devices already seems to be short on staying power, as well as cost.
Had my first close encounter with a drone last week as one zoomed around over the ski slopes while I was having some fun in Italy. This was in addition to at least two low-flying real helicopters that appeared to be involved in some kind of practice or observational exercises.