Well, maybe it is dangerous for them to assume you will safely pull in behind them? What if they suddenly have to slow down? Since you would be in their blind spot, they could be afraid of you would either crashing their car from the back or the side as you are pulling in. I do not know, I just doubt they were trying to be a jackass. Either way, just glad you are safe.
It is quite interesting to see your point of view though, since most people I know think one is rude if they speed up when you are trying to switch into their lane.
Well, I guess it is a good thing you have math homework compared to reading homework
