Aside from those who enter fake addresses or addresses they do not control, the folks who set up websites like this can also connect each email address with an

Aside from those who enter fake addresses or addresses they do not control, the folks who set up websites like this can also connect each email address with an IP address. This might be useful, e.g., for determining geolocation. It is sad to think that naive users are falling for this every time a data breach makes the news, handing over their email address to total strangers.