Heston
Absolutely nothing.
It just seems incredible that someone would use a paraglider in this manner - alarming spectators and apparently endangering himself and others in a stunt which, on the face of it, breaches several Rules of the Air and for which nothing whatsoever will be done about it.
Discipline in aerial activities appears to be going downhill - in the past year I've witnessed low flying aircraft, been 'cut up' in the circuit, been subject to 'ungentlemanly' behaviour on the ground whilst taxying and now this example of seemingly idiotic behaviour.
In all the years I've been flying, this has been the worst in terms of breaches of airmanship (TEM) from a number of perspectives.
Around 12 people die every year in general aviation accidents in the UK. Sometimes, unfortunately, you can see why!