So I'm pretty sure my house has ghosts, and they've recently turned mildly violent.?

Yes, it could be ghosts. But keep in mind, there are many different types of spirits. I think maybe you have Telekinesis spirit in your home. That explains why objects are moving around or being broken. What do the voices say? Next time activity happens try to figure out who they are and why there trying to contact you. Maybe even try to talk to them and see if they answer. Ghosts are usually NOT evil. Demons & ghosts are completely different entities. Most times there lost souls who aren't ready to pass on to the afterlife. Don't be scared, spirits shouldn't be feared. Ghost boxes are pretty interesting too. :) Look up information about different types of ghosts online!