Well, in the case of SIA yesterday, their whole system was down so they couldn't take in phone wagers. I'm not sure if phone wagering was up when BetPhoenix was also offline the last couple of days.
More books also have live chat feature, so that should help.
Scolding people in not using the phone wagering system... no need to do that. After all, with websites down, that means a dramatic increase in phone calls anyway, so it's not the magic bullet, either.
* CalvinTy