Interested to hear about what the rules or restrictions are for children at your venue?
We have recently included a clause in our wedding contract to stipulate that if there are more than 10 children then a supervision service must be provided (creche for example). This was due to regular damage being caused by children running around after dark in the gardens with little supervision as parents were enjoying themselves.
Unfortunately as with all these things its the minority that spoil things for the majority, but having had a near miss when a child nearly fell from a tree during a reception, because his mother was too drunk to supervise him properly, it was necessary action to take.
I would be interested to hear what other venues do/don't do.