Likewise, if you saw me put "Get kidney transplant" on my calendar and decided to subscribe to my calendar, then that's pretty fucking weird. I wouldn't buy "that's bad practice so I was allowed to stalk you". I'd be like "this dude is a fucking weirdo, can I go work elsewhere?".
My calendar at every place I've worked has been public with private events for sensitive stuff but any time I put some private stuff public I'd expect someone to ask me if I meant to do that if they noticed.