I need to follow-up with the people I invited to my wedding who have not yet responded (we've reached our "respond by" date and one of our vendors requires a headcount in two days). I'm just curious if it's considered poor etiquette to follow-up through email, text or FB message (I have some friends and cousins where FB message is our primary source of contact) rather than calling? I'm not much of a phone person, and I also feel like these other methods give people the chance to reply at their convenience (rather than put them on the spot if they happen to answer). Thanks so much!