If owning shares means having an, admittedly small when it comes to a firm the size of Boeing, part in the decision making process and a financial stake in the company, then yes, in principle. Shares aren't a vacuum-sealed number-go-up game, taking a share means an interest in supporting a company via investment or a desire to be involved in the decisions (which usually requires a substantial investment as a proof of stake).

It gets a bit murkier when it's all mashed and derived and packaged to death which results in things like the Church of England accidentally (or at least they divested when it was pointed out) having shares in things that it doesn't share philosophies with such as oil companies.

I never said they should be punished but it's an interesting thought exercise. A long-time stock holder in Boeing has indirectly profited from the death of innocent airplane passengers, I certainly wouldn't object to them losing that profit. And if punishing executives is permissible... well, those execs serve at the pleasure of the stockholders. There's surely _some_ responsibility there. But no, I'm not saying we should lock up the stockholders.