Mdthbs

If an instruction next to a button says ‘do not push’, some people end up pushing it. Their desire to do the opposite overpowers the fear, if any, of repercussions. Is there any word for such a trait in a person?

This is contrariness (one sense of).

contrariness: n 1a deliberate and stubborn unruliness and resistance to guidance or discipline

[Vocabulary.com]

listed synonyms include perverseness.

wilfullness OED

The quality or character of being wilful; disposition to assert one's
own will against reason, persuasion, etc.; determination to take one's
own way; self-will, perversity, obstinacy, stubbornness.

From the 14th C, the sense of wilfullness is 'nefariously' deliberate, knowingly, and on purpose.

It is called reactance in psychology. Moreover, the reverse psychology technique relies on the psychological phenomenon of reactance, in which a person chooses the option being advocated against.

Description:

When people feel that their freedom to choose an action is threatened, they get an unpleasant feeling called ‘reactance’. This also motivates them to perform the threatened behavior, thus proving that their free will has not been compromised.
Research:

Pennebaker and Sanders (1976) put one of two signs on college bathroom walls. One read ‘Do not write on these walls under any circumstances’ whilst the other read ‘Please don’t write on these walls.’ A couple of weeks later, the walls with the ‘Do not write on these walls under any circumstances’ notice had far more graffiti on them.

http://changingminds.org/explanations/theories/reactance.htm

OED definition and the earliest citation:

Psychology. A response of resistance aroused in a person who feels his or her freedom of choice is threatened or impeded.

1966       J. W. Brehm Theory of Psychol. Reactance i. 2         Since this hypothetical motivational state is in response to the reduction (or threatened reduction) of one's potential for acting, and conceptually may be considered a counterforce, it will be called ‘psychological reactance’.

The version I'm familiar with is: don't think of pink elephants.

Wikipedia has an article on this called the ironic process theory.

Ironic process theory, ironic rebound, or the white bear problem
refers to the psychological process whereby deliberate attempts to
suppress certain thoughts make them more likely to surface. An
example is how when someone is actively trying not to think of a white
bear they may actually be more likely to imagine one.

Counterproductive seems to fit your request pretty closely. The OED defines it as:

Having the opposite of the desired effect, tending to act against the attainment of an objective.

Here are some example sentences -

1. Still, others say fasting is counterproductive because you're starving your body and your body's natural reaction after the fast
will be to gain weight as quickly as possible.

2. If you're feeling overwhelmed by stacks of photos that have yet to make it into your albums, the thought of creating a layout with
just one photo may seem counterproductive.

3. If you answered yes to any of the questions for counterproductive anxiety in exam-taking, stress management techniques
and tips may help you reduce your nervousness so you are able to
competently take the test.

4. Plucking and waxing may seem like more effective methods than shaving or depilatory creams when it comes to embarrassing facial
hair, but the long term results can be highly counterproductive.

5. It might seem counterproductive to eat more often, but there's a lot of evidence out there that suggests those who eat smaller meals
frequently throughout the day may be able to better control their
cholesterol.

6. Behavior that gets you further away from a goal you are trying to
reach instead of closer to that goal is an example of
counterproductive behavior.

(yourdictionary.com)