T-Dog reminds that the writers are still stuck on that gansta stereotype of the 90s, seen in movies such as Menace 2 Society.
Meh. People like that exist. Just like red neck assholes like Meryl exist. If most black characters were like T-Dog and most white characters were like Meryl then there would be a problem. Walking Dead has quite a variety of black characters this season, I see no reason to complain. Bad writing/characters plagues the show in general so it's not exclusive to one race.
I know the OP was being hyperbolic and didn't mean Fox is saving black people, but an interesting point should be made. The portrayal of black men on mainstream television is getting better, and studies have shown television has a large impact on how children - specifically girls and minorities - view themselves. Not seeing yourself on television has an impact on self esteem. There's a reason why young white boys have more confidence and self esteem than girls and minorities. Western society is crafted to represent them in media; it's no wonder so many grow up with privledged views on issues like this (see: complaints about black main characters in television, film, comics, etc).
That being said, portrayals of black people seem to have gotten worse on "black shows." Reality shows seem to dominate black television habits, and the ignorant behavior isn't endearing. Hyper sexuality, hyper masculinity, disdain for intellectualism, etc dominate popular black reality shows like Love & Hop Hop, Housewives of x, etc. The days of the Cosbys and other black families on television seem to be gone, outside of Tyler Perry stuff.