For example, I used to teach a lot of performance fire art (lighting yourself on fire for the fun and amusement of others),

... says the user "daenerys". Totally didn't see that coming.

By starting with things that caused just mild discomfort, and slowly working your way up, you can pretty much negate the nocebo effect.

Acclimatization can achieve very interesting results, especially with subjective responses to things such as pain and nausea, definitely. I'm not certain, however, that this would still qualify as adjusting for a 'nocebo' effect.

It seems that "nocebo" has more to do with the perception of malady or pain being resultant from an event rather than what you're describing. Something like informing someone you've injected them with a needle without actually doing so, and thereby witnessing their pain response. Or the article's example of the man whose cancer 'killed' him.

A similar phenomnon, certainly, but the same? I don't know.