I think you don’t understand what a DMCA notice actually is. The whole point of it is to give you a chance to remove offending content. The “threat” of legal action won’t actually result in anything, provided you comply, and that is exactly why I do not understand the preemptive actions, when there is basically no such thing as immediate legal threat in case of DMCA notices. The copyright holders often do not want to go through the court system either and will gladly accept pre-legal-action compliance.