Aside from criminal issues, which need to be dealt with by the justice process, it's between the offender and the victim, and not the business of the rest of us.
Now, when you are not the victim, but are just disgusted by the person's behaviour, well anyone is free to associate or not associate with someone as they wish. I've let friends drift away because I didn't like how they lived their lives, even though their victims (if we may call them that) forgave them.
I think that requiring perfection of government officials is unrealistic and ultimately self-defeating. Everyone has both crimes and misdeeds in their past.
I signed a petition sponsored by a minor political party which is unlikely to get any seats in the coming state election, and they recently sent out a mass email asking for candidates; just having lots of candidates helps a party's overall profile and gets their ideas out there even if they don't win a single seat. Now, I don't agree with enough of this party's policies to stand for them, but even if I did, it's not something I'd do.
Being a political candidate makes you probably, and actually winning makes you certain, to come under the kind of scrutiny almost none of us could get through without looking very bad. The social media age is the Age of Public Shaming, and some people are not content until you lose your job or business, your spouse and children, and everyone who associates with you.
The nature of mob justice is that it's uneven. One man murders his wife and a few years later is able to continue drawing on his wealth to live an idle life of luxury, another man grabs a woman's arse and is reduced to lonely ruin and commits suicide. The family of the man who defended the murderer go on to become famous for being famous, and indeed one is able to, with a straight face, ask the world to donate to her so she can become the world's youngest woman billionaire, and this wealthy person's panhandling does
not lead to her being smacked down in the press, but indeed she gets praise for it.
We have all done something nasty or at least inappropriate, said something prejudiced, excluded someone unfairly, associated with someone who turned out to have done something truly awful, or annoyed someone enough for other reasons that they might decide to become creative with the truth. Many of us have been drunk, and all of us have been stupid. Becoming a member of parliament or the like is, for the common citizen, simply too risky in this Age of Shaming.
The other day I took my toddler daughter to the park, and took her to the toilet. A woman with a daughter the same age accosted me and demanded to know where I was taking that child, and why. Being a stay-at-home father makes you the target of suspicion from busybody strangers. Being a member of parliament would be even worse.
Aside from criminal matters, it's between the offender and the victim.