>Whos to say in a couple of years time all these labradoodles could turn nasty due to the bad breeding.
Spot on.
Any type of dog that becomes popular is subjected to the activities of the 'jump on a bandwagon' type of breeder, who're happy to churn out puppies to fill a manufactured niche in the market. Hollywood films are very guilty of this ("Lassie", "Rin-tin-tin" (for those of us old enough to remember), "1001 dalmatians" umpteen times, "Turner and Hooch", "Beethoven", "Incredible Journey" ... the list goes on) plus TV advertising ("Dulux dogs", "Andrex puppies" etc etc) and any bitch and any dog vaguely resembling the 'stars' are put together regardless of quality and there's your problem.
'Labradoodles' are one in a line of timebombs.