[Zope] manage_beforeDelete

In an effort to know when an instance deleted of my class, and not just when the reference count equal's zero, I did some digging in the Zope code, and found that if I create a function called manage_beforeDelete, this does exactly what I need.. It gets called before before the object gets deleted from Zope.. Now question is, is this safe to do, overriding this function? I wouldn't want to corrupt ZODB or whatever... Anyone have an opinion on this?