Yea, because even though they are sometimes suttle, people who know what they are talking about find it somewhat interesting. Like in Vice City on VCPR, how the preacher guy is talking about the Russians parachuting down and "kids running into the forest," or something like that.
I do find it funny the things that they put into the game. The whole thing with The Truth was funny(especially when he tells Carl how he met Jethro and the other guy).
I think in the next GTA, they should do something to help complete what the Green Goo was or just have it in the next game in general.