No. I'm only level 38 and struggling to keep interest in this game as it is. If I were forced to start over, well, I guess I just wouldn't. But I highly doubt they'd risk doing that over a few bad apples.
I just hope heists bring some much needed depth to the game. The only reason I haven't walked away already from GTAO is because I don't feel I'll have given it a fair chance until the heists are available and the game has all the content it was intended to have. Hopefully it'll be sooner than later because I get less interested every day.