I think calendar blocking should be a function of joint approval by ALPA and CP. There are legitimate times for doing it and it would be approved in those rare cases (stalking/harassment, divorce when both pilots are FDX, etc) but the mere process of requesting a block will usually (1) draw attention to and cease the stalking/harassment or (2) be denied due to unethical reasons for requesting the block and result in a follow-on investigation. It is a self policing policy for those who use bots or have a hook up in skeds...can't hide your actions from your peers who you are buddy-******ing. I know the last thing we want is more management power...but this might not be a bad idea.