Of course, without sounding (I hope) too preachy, there's nothing wrong with a little violence in an adventure story, and if he's reading any of the DC "kids" books...well, I seem to recall it wasn't too long ago that they recapped Batman's origin (no explicit violence, but I think a gun, a sound effect, and a kid in a puddle of blood qualifies as "violence") and had the Spectre do some rather heavy-handed things.
Now, you're right that Blue Beetle is over the top, except for some key points in his run, but after a couple of issues, Daredevil does (as mentioned) settle into "Saturday morning" territory, for the most part. Most of the Quality characters tend to be more on the cartoonish side, even when violent (that's "most," mind you). As mentioned, Fawcett is often similar. As you might also imagine, since they built their companies on the backs of small children, that Dell and Harvey (less so for Harvey) would be parent-approvable.