Hi there. I think ping is worked out how fast the signal gets to/from your computer to the game server.
Your ping sounds pretty good to be honest, of course the lower the better but 150 isn't bad at all.
You shouldn't get booted though for that, what server are you connecting to, maybe they should change their settings a bit higher.
One server I use gives me a ping of around 120 but that fluctuates quite a bit, never goes highter than say 180, another will give me a ping of about 75, not bad for a 2Mb connection. Just depends on the server really.
Only other thing to do would be get a faster connection, 2Mb or 8 as I have seen lately as you cannot change the ping yourself.