Regardless of any "Law" the person who shot the arrow would be legally liable for any damage or injury.
One option you have is to report the matter to the police & ask for a log number so that the incident is officially recorded, & inform the club of it, that way should something nasty happen in the future they can't claim it's never happened before
You might also want to think about who's side the landowner is likely to take
if the club pay rent (or the owner is an active member) it might be you who gets told to go for stirring things up.