Can I accuse an up and coming business of capitalizing off of another's hardships?
I'm not sure. Are they really using other people's hardships in order to make money for themselves?
No, I just want to cause a problem.
It is wrong to lie and hurt people if you have no idea if things are true. If you don't think the company is actually doing something wrong, then you shouldn't say anything. You could open your self up to legal issues if you make false accusations like that.
I'm just going to accuse them without doing any research on them.
If you do that then they'll easily be able to refute it. Saying something like that could not only hurt you now, legally, but in the future anything you say might not be believed. It would be a good idea to not say anything at all, especially with no evidence.