Wow, what a heated topic. I am not sure where I stand on this, but selling the markers is horrendous. I think the idea of a virtual cemetery is wonderful. It appears at this time I don't have any relatives buried in London (you never know what I might find) but I would be more than happy to send a letter or sign a petition. A solution here could help cemeteries, families, historians, etc. for years to come.
On a similar note: In finding my gg grandparents grave in a small Catholic cemetery in New Jersey, I was told I could be buried in the plot. Apparently, it is a family plot forever and after a certain amount of time (I think he said 60 years) the grave is open for family members.
Kathleen