Probably been done before but whatever, quite cool.
Go to dis. Be as accurate with it as you like, for obvious reasons you might not want to use a specific address.
Use the search box to locate your street, town, city, state, and country etc
On the marker that appears, you’ll see a link that says ’Save to My Maps‘ within the bubble.
Click the link and select the <Newcastle Online Map>.
Put your forum username as the title for the marker, and within the bubble provide whatever info you’d like.
If it posts location use the edit function to change it to username, better if everybody uses their usernames
To edit you click the Edit button at the top of the left scroll bar, click your marker, change the name, then click OK, then click save at the top, then done at the top.