No one individual, or group should be held accountable for draft choices, you pick the player you think is the most suitable for you when it comes to your choice. Sometimes you will get it right, sometimes wrong, get over it, no one is going to make the right decision every time.
Were we fully aware of Toumpas' bad hips at the time we picked him? If so then we clearly thought he was still the best player available.
What do you think happened to the Portland Trail Blazers recruiters in 1984 when they took Sam Bowie (who?) at pick 2 when Michael Jordan and Charles Barkley went at picks 3 and 5 respectively? Nothing, they picked who they believed was the best available, even though they were aware that he had serious leg problems.
Give Toumpas a chance, I still think he will be a very good long term Demon. And we need players like him.