I well recall being kicked out of Marwell a few years ago during high winds. I was one of only two visitors in the park at the time. Since I have always been a member I was not out-of-pocket but the member of staff who ejected me was not to know that and no refund was offered. Bad practice.
What's worse, I had been dropped off at the park and was due to be collected at a particular time in the afternoon. Since this was pre-mobile phone, I ended up having to walk back to Fair Oak in high winds and rain. Not happy.