I generally use a spam email address for whenever I have to share one.
But it is a good idea to try to hide these from attacks such as phishing emails.
Can we get this added to the OP by any chance or maybe get a new thread with a list of managers who do publicly share users' email addresses?
I've pmed 2 or 3 managers maybe to hide the email id column.
One of them (EquityBase) responded and hidden accordingly and the FianciaCoin did not respond and neither hidden the email id column.
After that I didn't contact anyone for this issue. But I'm thinking to drop a msg is future to every one of them who falls in this issue to hide the column.
Give a negative/neutral trust rating to the manager who did not respond to you as that might get them to respond to what you wrote and give you the reason why they didn't want to hide the IDs. It might just be that they missed the PM if they have had many of them.
EquityBase who you said did respond and hid them has shown their credibility as a manager here and it's good to see one of the managers have responded.
2/3 managers as you suggest is quite a low set of users that you have tested though (it's a good start).