They do not care about outbound attacks. They care about anything that goes against the approved narrative. The only way I've managed to get them to care was to have a coworker translate my email into Chinese characters and give CIDR blocks to their government and say they are spreading democracy and those networks go silent. The ISP's will just ignore complaints otherwise.
This was ages ago. I try not to hold onto old corporate emails. And agree not to. I've honestly had mixed feelings about it given that some people probably got their door kicked in. In fairness to me they were DDoS'ing my customers. The CIDR blocks were part of a DDoS for hire farm.
