Without sounding sarcastic... the website is ‘divebuddy.com’ which most people would understand that this is a place to people to meet who have something in common... Diving!
If you do not wish to accept any dive buddy requests, you will not meet any dive buddies. If you do not want to be bothered by strangers/preachers/potential dive buddies, then why did you sign up?
Yes there are some exceptions as there are on any social networking site... but there is a little tool called ‘Delete Buddy’. Plus if you do ever get stalked by a member who things you are just far too charming to leave alone, there is also a ‘Block Member’ option... If you do have some stranger turn up with a bag expecting to relocate to your sofa, then all I can say is why the hell you gave out your house address in the first place?!
If you don’t judge people by their photo or their marital status or random friend request, you might actually meet some cool people