It *is* an unethical practice.
If neither of the parents were visual, you cannot(or shouldn't) label any offspring as a 100% Het until it has proven out. Even if anyone could pick out a true Het, the most you can sell it is a 50% or 66% het if the parent was a Het. Its all based on the sellers integrity I suppose. But I personally find it unethical.
Mike has a killer cinny 50% Het pied. Its so funky, there's no doubt it will prove out Het pied. But the seller couldn't sell it as 100% even though it visually showed promising signs because neither of the parents were visual.
Sent from my DROID RAZR using Tapatalk 2