Hmm, well first, lets take a look at what each ratings mean:
iCarly is rated "G" for "General Audience" so let's take a look at what a rated G show is usually defined as
"Most parents would find this program suitable for all ages. Although this rating does not signify a program designed specifically for children, most parents let younger children watch this program unattended. It contains little or no violence, no strong language and little or no sexual dialogue or situations."
Personally I've seen kids shows with much worse stuff, but that was during the 90s. And in my opinion, a fork going through his shoulder isn't that bad, and the "sexy" comment, who cares? Its not like I didn't go out side the other day and hear a bunch of 8 year old talking about being strippers in each others harems and using the F word every other sentence. Oh wait I did. And there is MUCH more hidden adult humor in iCarly. Kid's just won't really understand is as much.
Face it, times are changing for the worse when it comes to what is appropriate on tv. Back in the 90s, they even took shots at the censors missing what they throw in there. and no one cared. kids were innocent kids still. Now, everyone makes jabs at what is appropriate or not, the shows aren't what they used to be, and kids know WAAAAY to many things they shouldn't know at age 8.
I think I went off topic. Oh wells, I'm in a rush and I haven't posted in weeks xD