I am security conscious and take bacs as a payment option, if anyone then uses these details to set up false direct debits, then it is down to the bank as they have not done enough security checks and the bank HAS TO reimburse the funds that have been taken without your consent.
I am more than willing to pay sellers by bacs if they are happy to accept it, but the main thing should be the sellers choice to either accept a payment option or not to accept a payment option.
No matter what way you pay there is always the possibility of being ripped off as a seller, but gladly there are more great buyers than there are bad fraudulent buyers.