Picture posting is enabled for all :)
I expect the time limit was put in to make it look fair. An hours exercise for most would be really just a figure to put out so there would be room in some parks for everybody without it getting too crowded. I think the allotment 'exercise' original idea was ok, you can do it but not all day. There are even people on my street who resent that I can go and play at the allotment. I don't time it, I just come and go as I wish. The only restriction we have is no visitors unless it is family living in the same house. But as far as my wife knows it is no visitors at all.