Yes and no. The governments powers wrt speech are limited, but certain things like threats, yelling fire in a crowded theater, and other crimes/regulations do n

Yes and no. The governments powers wrt speech are limited, but certain things like threats, yelling fire in a crowded theater, and other crimes/regulations do not have 1st amendment protections. The DMCA is an exception because it's a law, just like a threat or any other illegal material/etc would be and removal of that thing can be mandated by law without it being a 1st amendment issue.