Yep, that's right.
This show is fantastic with its writing and visuals, but not for little kiddies.
I made the mistake of watching this when I was 9, along with watching Smosh around the same time.
It's not like every single line features extreme profanity and alike, but it's pretty frequent.
Anyway, this show is great.
Maybe not in season 1, but by season 2, it took a major improvement and just continued on from there.
The only peculiarly bad ERBs that are not from season 1 are Charles Darwin VS Ash Ketchum( In which the concept being ripped off from a meh fanmade rap battle was the least among its issues.) and Hillary Clinton VS Donald Trump(I like a good Trump Impression, but I don't like hearing a Trump impression on a slow beat.)
It took a bit of a dip during the first 4 battles of season 6, but then Jacques Cousteau vs Steve Irwin saved everything.
There's also the previously mentioned fanmade rap battle community, many people have decided to mimic ERB and upload their own rap battles onto the internet.
Some of them are good, and some of the others are The Best Rap Battles Of All time.
This title contains:
Violence & scariness
Drinking, Drugs & Smoking