You can turn off these emails though, surely? At least, you can with linkedin, as I have. I am not a quora user, so I can't talk there.
That said, I usually go with the email-alias trick. Not all websites like emails with a + in their name, so I have a postmap file on my server to map service@domain to my real address. If I want rid of that sites email because they won't respect my unsubscribes, I just remove that alias.
I've also heard of people using the likes of maildrop to /dev/null email they don't want. I have maildrop set up, but no rules in force to delete stuff, just to move.
I suppose since most MAC stuff is described as "beautiful" and "stunning", which is also a somewhat extreme description for an email client or a file manager, then we have to have extreme negatives to match?
The yum install xorg-x11-apps bit is so you can use the xinput tool as a demonstration of the problem. Fedora doesn't have it by default apparently so you need to install it.
A malicious app could just directly use the X protocol, no need to call this app, so unfortunately no additional privileges are needed.
That said, I usually go with the email-alias trick. Not all websites like emails with a + in their name, so I have a postmap file on my server to map service@domain to my real address. If I want rid of that sites email because they won't respect my unsubscribes, I just remove that alias.
I've also heard of people using the likes of maildrop to /dev/null email they don't want. I have maildrop set up, but no rules in force to delete stuff, just to move.