The common pwgen utility supports a useful feature for use in public: generating a "screenful" of multiple passwords, letting the user choose one before clearing the terminal.
This helps mitigate shoulder-surfing.

This isn't a "serious" security measure; I'd categorize it as being similar to a simple screen locker. Enough to save you from some embarrassment or an immature person nearby, but not a competent attacker.

I don't think I'll include this feature, but if other people find it useful I just might. pwgen is such a common utility that it might make sense to support some compatibility, even if it means adding a near-useless feature like this.

-- /Seirdy