Enforcing Campaign Finance Laws

Apropos of this story:
Most campaign finance laws are toothless, which only adds to their hypocrisy. But a good test of whether a law regarding campaign finance – or elections generally – is worth enacting is whether a violation should be sufficient to result in (a) imprisoning a public official, (b) overturning an election result or (c) calling a new election. And you should consider that possibility in the worst case scenario, where it means convicting a politician you strongly support and/or handing over an election to an adversary you loathe.
Some laws are clearly worth that: laws against voter fraud, laws against outright bribery, even laws against taking money from foreign governments. I would argue that if you replaced the current scheme with clear, bright-line full-disclosure rules, non-trivial violations of those rules could be sufficient to result in one of those three severe outcomes.
If the purpose of the law in question isn’t worth overturning an election or throwing an elected official in the slammer, then it shouldn’t be on the books in the first place. Free speech, even about politics, has its outer limits, but within those limits the government shouldn’t be handing out speeding tickets.