Signaling is, generally speaking, a means of displaying social status and desirability as a mate, yes?
If you can believe it, this claim isn’t strong enough:
you wear a suit to a job interview (otherwise you might be hard to work with)
your bank spends a lot of money on impressive buildings (otherwise you wouldn’t feel safe giving them your money)
the government. The last three American presidents have been drug users who supported the War On Drugs. Otherwise, people would think they were soft on crime.
In that case, parallel reasoning eliminates anything taboo. We signal our acceptance of community norms by avoiding taboo subjects. We might tell stories to make it less obvious that conformity is an end in itself: “intelligent people resist the temptation to swear and find more effective ways to express themselves,” cf. George Carlin and his seven words.
Fight of flight responses seem like a pretty clear case. Until the 20th century, most military engagements were won by putting the enemy’s troops to rout and then destroying the fleeing army in detail. That suggests many find it preferable to risk total disgrace, and possible death later, to be able to run away from an immediately dangerous situation. (cf. The Red Badge of Courage, Spartan women saying “come back with your shield or on it.”) Other extremely intense situations, like a parent protecting the life of a child, would probably work the same way.
We’re told it’s a bad idea to go into business with friends because we tend to overestimate the likelihood that they will remain loyal to us. Also, we’re sometimes willing to put up with the opprobrium of friends or relatives for a potential mate. Obviously signaling is extremely important in business and mating, but we will ignore it if the price is right.
Actions taken under the influence of drugs or alcohol might count, although there’s a wide range of behaviors to sort through. In college I knew a lot of people who drank heavily and publicly so that they could be (or feel, or feel perceived to be) signal-free for a while. There’s also the narrative that East Asian societies are socially repressive but don’t hold individuals responsible for their behavior while drunk, so binge drinking in groups is a common way to relieve stress. I have no idea whether it’s true, but it’s obviously a story about signaling. On the other hand, a guy on an acid trip, having a conversation with inanimate objects, isn’t signaling anybody.