No, this is the price to pay for living on or next to a Golf course. There are probably signs all over the club stating they are not responsible for stray golf balls.
65% or so
on an average i think about 50 or 60 depending on who you are
Yes, pro golfers can use any colour of golf ball as long as it has been approved for tournament play.
Garden gaing balls are desinged to scare away birds and other pest.
Yes, if you do it with rubber balls in elementry school. if not, no. (why is it illegal?)
no, all golf balls come in the same sizes. The size of golf balls is regulated and must meet specific measurements for both size and weight.
Gazing Balls are also called yard globes, garden balls or mirror balls. These are considered to be a type of lawn ornament and one can find information about these on the 'Garden Web' site as well as Wikipedia.
The golf balls are property of the golf course on which they are, taking these balls could lead to prosecution. However, if you ask the owners of the golf course you may be able to take them.
Do they? I would lose 1 in about 3 rounds. It just depends how straight you hit it and how what hazards there are to lose balls in.