I like the sentiments of "You don't need a permit" and "You don't have to say 'peaceful protest'", but there is definitely a right way and a wrong way to protest.
It's not a matter of what you choose to do. It's a matter of who you choose to do it to. Focus your efforts on anyone in the "Problem Class" (anyone worth 8 figures or more) and you can do no wrong.
Intentionally inconvenience any member of the general public, even slightly, and you can do no right.
Move your obstructive protest away from the freeways used by the general public, and take them to the entrances of a gated community where the problem people live. Obstruct the problem class. Don't oppress the general public.
Edit: Huh. A bit more support for fenced-in decamillionaires than I would have thought.