There's no question that his behavior was "problematic." What is not at all clear in that scenario is whether or not it was unlawful for him to continue to communicate with her. "So much" literally means there is an acceptable amount of communications. Blocking on Facebook is a completely passive action which does not directly communicate anything. Sure you can deduce that she didn't want to hear from him again, but she should have sent an unhedged message to cease and desist further contact, THEN block him.