Was playing last week with some friends, and my ball WAS still in play, but i could not take a swing as the boundary fence was too close... was i intitled to a free drop? my friends say no, were they right?
They were if the fence was an out of bounds (i.e. "boundary" as you said) fence.
From Definition of Out of Bounds
Objects defining out of bounds such as walls, fences, stakes and railings are not obstructions and are deemed to be fixed. Stakes identifying out of bounds are not obstructions and are deemed to be fixed.
In effect they are treated like trees. ie 'some thing like that'