hi - have you seen http://www.economist.com/news/briefing/21588057-scientists-t... and https://news.ycombinator.com/item?id=6566915 - this is exactly what you were worried about at https://news.ycombinator.com/item?id=6487356 (i would have emailed you, but i can't find an email, so am replying here - given that economist article i may have underestimated the importance of the effect).