Rachel likes 'Bob-Bob Bits', but she prefers Thomas, Bob the Builder, Olivia (yay for new shows), and Backyardigans.
I look at Spongebob as similar to the Looney Tunes that alot of us grew up on. There was alot of ridiculous cartoon violence in them, but I don't remember anyone looking for Acme bricks to drop on each other.
Things like the TMNT and Power Rangers, on the other hand...that kind of stuff will never see the light of day in my house. Every time I went to a pre-k teacher conference back in the 90s, someone would bring up the fact that their students were acting the shows out on each other (happened in my classroom too).