> If you show up at the polls to intimidate voters you get arrested.

Yes, if this is consistently and fairly enforced, I agree - only doubting that it is because I honestly don't know, and hopefully never have to find out firsthand.

> many of the voting machine vulnerabilities are as a result of submitting specially crafted ballots

Yeah, fair enough. I don't know enough about the vulnerabilities, but if this is the case, I agree.