"dig in your heels when confronted with overwhelming dissent"

Sorry, sticking to this one.

Call me anti-social if you want, but facing overwhelming dissent may indicate you're the lone free-thinker in an echo chamber. Being that one guy who's always prodding the hivemind with a pokey stick has value in my opinion (though you will end up getting stung on occasion).

Sometimes it's not about being the "free-thinker," but just fitting in. If you're in a setting where there can be 'overwhelming dissent,' I would say it's prudent to pause and consider what your goal is with pushing a certain idea. It's almost certainly not going to get the consideration it deserves to be accepted if a mass of people have a negative knee-jerk reaction to hearing it.

> facing overwhelming dissent may indicate you're the lone free-thinker

You just better be right. If you're wrong then no one will ask for your input ever again.