You are all free to unfriend people after everything is done.
I personally wont comment on other peoples profiles or message them until the event is done. Then I would assume everyone remaining on my friend list is cool with me. But even then I will send a message before trying anything naughtier.
“Simple minds have always confused great honesty with great rudeness.” - Sherlock Holmes, Elementary (2013).
"Did you guys expected some actual rational fact-based reasoning? ...you should already know I'm all about BS and fraudulence." - FunFan, VGchartz (2016)