Yes, except if you are in my University, where professors are fossils and knowing OSI is required to pass the CN exam.

Thought I was the only one who noticed

That is why I have:

• a few emails for registering wherever I should be able to do stuff without an account, but for some reason can’t. One of them is a gmail for every place that allows to log in with google.
• one email that I use for account, where I actually may give a shit about the the emails I may recieve from the services I registered/subscribed for.
• one email used exclusively for e-mailing. No accounts, no subscriptions.