TheBeanTeam:Most of the people who are viewing waymarks are not waymarkers so it makes sense if you are creating an informational/useful waymark that the address be included.
Personally however I think the address boxes should be done away with for a simple text box. Some places just do not have a real address and there have been a few times I had to create answers to fulfill a required variables fields. Something I really don't like to do.
I agree with the OP that the address field, whether it is a multi-line text box or the awkward address field, should be optional.
But yes, unlike finding a geocache.... waymarks can be visited without a GPS. I wager that I could find most with a simple map. Actually, in many cities it is almost a requirement to carry a map of the locations or else you end up double-tracking, crossing switch backs and other expressions that don't really mean anything.

BQ