They do get a lot of "spotters" at WW. Unfortunately the club house is not really big enough to accommodate members (and their guests) as well as visitors and spotters. I think anyone genuinely looking to learn to fly, or to join the club would be welcomed with open arms, whereas spotters and oiks should be kept out. Why should members, who pay a lot of money each year, not be able to get in the clubhouse at weekends?
It did go through a phase a few years ago where you couldn't move at the weekends, there were kids and dogs everywhere. Members of WW like flying, and like the old fashioned "club" atmosphere. Most of them don't want it to become open to all - look what happened to The Red Baron over at Booker!!