Should we profit from our own misery?

I have something to run past you, and I'd be interested to know what you think. I've just recently taking to dabbling in the stock market. It's enormous fun, and I'm cheerfully ignoring the fact that the company in which I made my first acquisition is currently number five in the "Top Ten Losers" list on the BBC website, as I'm sure this is only a temporary glitch. Whilst I was perusing the list of possibles, I had a flash of inspiration. Why not buy shares in First Group, seeing as they make such enormous profits? Why shouldn't we benefit from our own misery? I hesitate to take such a step, as I feel it is somewhat wrong to be investing in a company that causes me such misery on a daily basis, but then I had another thought. Why don't we all buy shares in First Group? Wouldn't we then be in a win-win situation? Either they improve the service, and our dividends go down, or they don't, and we cash in? And, as shareholders, don't we have some small influence? I'd like your advice before I take the plunge, as I don't want to be seen as some kind of traitor to the cause. Please let me know your thoughts. The other option is to keep my morals intact and go back to investing in the lesser evils like guns and pharmaceuticals.