Taking points in random order:
Say again s l o w l y:
Why should I or any other operator of a private farm strip have to ask the CFIs of schools to keep their aircraft away, please. Although a low approach and go araound is perfectly legal subject to 500ft rule, that doesn't make it any more courteous.
It doesn't matter how long or short my strip is, my reckoning from the ground is that these practice glide approaches would overshoot - ok, that's what practices are for.
Whopity:
My strip is in a field that is neither large nor square.
My own why?:
It may be good practice to glide approach onto prepared ground, but shouldn't the stdents learn that a strip of grass, even with a windsock, without PPR may be unsuitable. Do these people also set up approaches to the nearby golf course, I wonder? If I do a PFL with a student and they select an 'unsocial' field, I'll comment on its suitability for a real forced landing, but suggest that it isn't appropriate for a practice. Don't other instructors do similar?
Come on, guys, defend your practice.
Madam Breakneck