I have no idea what actually caused the bends. I haven't done anything stupid with car. No accidental curb jumping, no crashes. I've hit pot holes, but they were the hits all felt the same as others I've hit in other cars (that were heavier as well) and this my first experience with a bent wheel. Bent lips I've had, but never a section of wheel bent in.
I do drive my car "spiritedly" often. But I've treated all my other cars similarly. I'd say just be a little more careful than you would with a set of regulars wheels. Dodge the pot holes (as best you can anyways) and keep an eye out for or rough patches.
I can honestly say I don't know when it happened. I found it by chance during a meeting with couple of other guys on this site.
"Weak" may be a harsh term to use, but just be mindful and you may be fine.