Re: I can barely recall when HP was one of the best companies in the world...
Not at all. Being a shareholder gives me a voice (however small) in how a company is run. I get to vote for board members, and those board members make promises to me (the shareholder) about how they will run the company.
If I hold shares in a shoe company and that company is using child labour I have two choices: sell my shares to someone who doesn't have a problem with that, or use my small voice to agitate for change. I generally prefer the latter. All that is required for evil to flourish is for good men to do nothing.