How to make a map with pins

Factual Questions
1

Let’s say I want to chart where all the users on StraightDope are situated in the world.

I want a map where other users can go to, find their hometown and place an interactive pin in the map. I’d want it to be visible to all other users.

I would only use one which does not give any personal details away (i.e. I don’t want to sign up for one with a username or email address)

How would I go about this?

2

Google maps?

You might want to create a new google account rather than use your own.