filtered unserialise() - results

Hi! The vote for https://wiki.php.net/rfc/secure_unserialize has been completed (actually, should be last week but I was busy, sorry for the delay) and the RFC is accepted 17 votes for to 6 votes against. Now, there were proposals to amend this RFC slightly to make the additional parameter an option array - with sole option currently being accepted classes list for now - in order to allow future extensibility. I am somewhat undecided on this option, but rather than make a new vote for a small implementation change, I want to make an informal poll - *if* I decide to make it an option array - would anyone strongly oppose to it, and if so, why? Note that it is not a vote either way - rather, I'd like to hear if somebody has an argument against doing this (I've already heard arguments for it). So if you oppose it, please tell the reasons why. I have some (which I previously posted on the list) but I'd like to hear from others too. Thanks, Stas