Personally I feel it was disrespectful to everyone involved. He showed a lack of interest in both the honor of carrying the torch & those who had come to see the event. His lack of engagement with the activity and crowd strikes me as both rude and arrogant, added to this the fact that he got the name of the place wrong I can't see why he was given the role. Admittedly I dislike the man and this may be colouring my views.
When put against the ordinary people who were chosen such as Paul Thomas who carried the torch in Merthyr and was chosen for his charity work, or the similarly named Paul Thomson, co-founder of the waterbabies programme which teaches swimming from birth and has both saved lives on at least two documented occasions and form the habit of regular exercise early, to mention just two, it is my personal belief Will.I.am had no place carrying the torch and his behaviour confirms that.