That's a good idea as long as its not open for abuse that's always the fear on websites, but as you say you don't have to give your exact address
no worries there fella password protected 
PM Sent to Cant Beta Omega 3ltr
Member's who are on this locator have a free choice as to how accurate they feel they want their marker to be. It is possible to change your address, but not move your marker later. Most members have tried to put thir markers accurate to at least street level as this increases value. On occasion they have had problems and asked me to move their markers for them later to nearer their correct position; one member even ended up in the North Sea!
The most accurate way to place your marker is to zoom in on your section on the map and enter your full address (at least make your postcode accurate) and then place your marker carefully before finalising it.
It is then possible to go back into, and edit, your address to make is less exact if you so wish.
Yes there is a risk of abuse, which is one of the reasons that this is password protected. There is ongoing technical work being undertaken by the moderators and administrators to embed the map into a members' only area such that it is only available to OOF members.
In the interim, I do take the liberty of veiwing your profile and reviewing your posts to determine your length of membership and general demeanour to determine whether it is appropriate to share the password; my reasoning it quite simply this; I work on the premise "would I feel comfortable allowing this person to see my marker and those of what I consider to be my trusted OOF compadres". Other members do the same or similar; I hope you understand.
The password is: ***********
Welcome
Nathan (albatross)