Signaling for a cause

Suppose you have come to agree with an outlandish seeming cause, and wish to promote it. Should you:

a) Join the cause with gusto, affiliating with its other members, wearing its T-shirts, working on its projects, speaking its lingo, taking up the culture and other causes of its followers

b) Be as ordinary as you can in every way, apart from speaking and acting in favour of the cause in a modest fashion

c) Don’t even mention that you support the cause. Engage its supporters in serious debate.

If you saw that a cause had another radical follower, another ordinary person with sympathies for it, or another skeptic who thought it worth engaging, which of these would make you more likely to look into their claims?

What do people usually do when they come to accept a radical cause?