I think Clark is over-reacting a little - there was speculation right from the start of his career, all that Tony going public does is make it look like nobody can be a superhero and have a normal private life.
Clark? Overreact? What, do you mean he would do something rash, like break up with Lois on the chance that he's a jinx or something?
Yeah, he might be overreacting, but when it comes to protecting his loved ones/private life, it's probably better to err on the side of caution.
Tony becoming Iron Man could also be proof that some people have hobbies that are way too expensive.
Thanks for reading!
