We all are trying to keep Maps as clean as possible and we all giving information as much as. But After giving clean information some spammers modify these edits whether no need any information. They changed the information.
So, If google add a recent edit option for mappers then we will know whoever modifiying the edits or places. As no one without being a local guide can't modify a simple edit. So, we could identity sapammer.
It's my opinion. It could be better idea for preventing spamners.
Thanks in advance