Interesting debate, just for info here's a link to the FPV rules that apply in the UK
http://www.bmfa.org/publications/fpv.html anything more than this and you have to be a licensed drone operator. I suspect 90% of the RCers would be happy to operate under these rules but the other 10% may consider them an infringement of their rights.
I haven't done FPV yet (but do do aerial video) but once the price comes down a bit I'll definitely give it a go.