It can be! I've definitely been to protests where, had an executive of the company we were protesting walked by, a lot of people would have gotten in their face and made them very uncomfortable. There's no law against being mean or rude, and often even vaguely threatening speech is protected by the First Amendment.

Corporate execs spend a lot of money and hire people to keep them insulated from the general public and our pesky opinions. If they had everything their way, they'd have exclusive access to their own roads and public spaces so that they didn't ever have to see or interact with us at all.