I can't believe what I am reading here. We had a home visit by one Coach, which is not usually the norm. He was in the area and wanted to stop by to meet my husband and I. We had already set up an official visit, he was in the area and my son was not the only one he visited. I am sure that he also stayed within the NCAA guidelines. I also understand that occasionally when they really want a player, they will visit you, get a feel for your financial status so they can make an offer that is not refused for financial reasons.
Beenthere is correct. Whatever you were told by the guru is way "off base".
Parents need to keep in mind that phone calls during the summer are a way of establishing a relationship between coach, player and parents. For some coaches, this is an important process, others don't care. Your abruptness may mean never another phone call. Most coaches will always welcome a visit to them on your own time, and you may want to consider this option.
I hope that you didn't pay for this seminar. I will give you all the advice you need for free.