Wouldn't it be wonderful if one of these people LOST their claim or we had a judge who had the courage to challenge this new way of making a small fortune?
As often as not people cave in and pay up, out of court, because otherwise the costs of the legal process are beyond their means, and way beyond anything the pursuer gets at the end.
However, at least here we don't have the iniquitous "No win, no fee" system, so that may deter someone who is a legal "man of straw" from taking on a case he just might lose, and have to pay the costs, if only a club is daring enough to take the chance.
Of course, the best of all would be if a club could prove a person suing them was in the wrong, standing where they shouldn't, or had been told etc.
I recommend that anyone who is regularly watching sports of any kind (or is accident prone like my family!!) gets good accident insurance, and then they can claim if something happens.