NOVA, the type of parent/player you're talking about is what I meant by the reference to "perennially disgruntled types." You know, always simmering because they are sure their son is the best around and just not getting his due on the team.
You will know these people because they are constantly carping about the team being beset by "politics." Meaning, they cannot imagine that their son is just not that good, so there must be some underhanded reason why he's not getting his due.
One thing that feeds this is when a team takes money from a kid who really doesn't have "it". When you say you're a college placement team and you take the kid's money, it implies that you think you can help him get where he wants to go. If you don't really believe that, because you don't really think he's that good, you're just asking for trouble down the road because inevitably they are not going to be happy campers, and then you have dissension in your dugout and in the stands.
A team is better off cutting that kid and putting up with one nasty e-mail after you announce roster decisions, than carrying him for a full cycle. But I guess in those rare cases where the team is really just a for-profit venture, the team is ready to put up with this as long as the check clears. I'd bet somewhere in there is a "no refunds" policy as well.