How close is too close ?

[Ketchn]

If you are sitting on a herd of crappie and slinging the do dah out of them and another boat approaches you , how close is too close for them be pitching a jig ?
a boat length , 2 boat lengths ,3 boat lengths or farther ?
interesting scenario , it happens often that we are just creating a fresh water flying/frying fish episode and it seems to attract other crappie anglers like a magnet to us at times .
so at what point is it considered in "my" space / bubble is my question ......?
just wondering what everyone thinks about it .