similar question but is it poor coaching or poor sportsmanship (or both) when defensive players stand directly on the bases when the ball is in play? This leaves no room for the base runners to round the bag while running. Had a girl hit one a mile but had to come to a virtual stop at both first and second because the first baseman and shortstop went to their bases and stood in the middle of them. ;&
Might be either, might be both, might be something else!
Is the coach teaching his fielders to purposely stand there, thinking that this gives his team some sort of advantage? It shouldn't, if your umpires are on the ball. Why have your fielders stand in a spot that, while technically not illegal in itself, puts them in a position where an obstruction call is much more likely? I'd call that poor coaching.
Have the players been properly instructed to clear the runner's path, but are willfully ignoring their coach's instruction and trying to impede the runner on their own? That might be poor sportsmanship.
The "something else" that seems to come up more often is just plain old ignorance. Fielder's that are oblivious to the play and don't realize they're doing anything wrong being coached by coaches that don't have enough of a clue to tell them to stop it.
And, just to be an equal opportunity "spoil sport", I'll add that it doesn't help matters if your game is being officiated by umpires that don't realize they're supposed to be watching for stuff like this!