The bag check is not enough. It's clearly a half-hearted effort at giving the image of being secure, and EVERYONE sees through it.
What they need to do is make ALL PARK GUESTS - of all ages - empty their pockets, take off their shoes, walk through metal detectors, run all bags through X-ray machines, and then make doubly sure by frisking everyone. Yes, Grandma too. Never know what some sneaky ol' lady will have hidden in her bra.