Ending subsidies = cutting. Your point's still wrong.
Edit: actually it doesn't, ignore this post.
In any case, Romney wants to eliminate government support for PBS, so saying PBS may not exist after that isn't "irresponsible" since as I understand it that's how PBS continues to operate.
I also object to call this "irresponsible" but turn around and act like cutting subsidies to PBS will have any effect at all on the 5 trillion the kid I quoted is so upset about.