PLEASE use your vehicle signal lights when changing and entering road lanes. I have been a victim of other drivers who calmly change into a lane without signalling and have also seen drivers who just turn into lanes without any indication at all. These people commit their act without any remorse or appreciation of danger.
This irresponsible behaviour must stop. Signal lights are in place in your vehicle for a reason and it is a way for you to state your intention to other road users, and not doing so will only increase the risk of an accident taking place. Why subject yourself and others to this kind of unnecessary danger?