I agree that this is probably a response to public actions - the public actions she made as a public representative of their company.

Even if that is not THE reason, it's certainly a plausible reason, and one I find much more likely and commendable than reacting to a DDoS. However, perhaps we shouldn't just jump to conclusions ahead of a comprehensive statement.

Perhaps it's a reaction to the public firing of the guy she posted a picture of on Twitter and accused of harassment?