You may also reply "maybe" to other people's events and then have a 99.3% chance of turning up. In the 0.7% chance you do not turn up you will apologise and then probably create another event in sympathy for missing the previous one, again, you will put "maybe attending".
Bro4: "Let's get so drunk we aren't legally able to drive!"
Bro5: "Soz can't, my mum's funeral x"
Bro6: *doesn't respond, but turns up, and has seen and viewed the event multiple times*
Bro2,Bro3,Bro4,Bro5: "Bro6, Pulling A Sharpie"