"Are we talking about highway driving or racing in Live for Speed? Please do not lean on the horn in Live for Speed - it marks you out as a chump."

I didn't mean to lean on the horn, something like a short horn for someone doing something crazy, like for example your side by side with another driver and he decides to turn into you for no reason. I'm not sure why people do that but it happens.

"If you are infront of someone (ie: Not being lapped) then blocking faster drivers is perfectly legitimate. It's a race, not a qualifying session. Be fair though - only one defensive move before each corner. Don't weave all over the track to stop someone getting past."

In a race or pickup race, I believe the unwritten rule is to only allow one block, so in that regard I agree, but to say that blocking is perfectly legitimate is almost like saying you can have a 4 car lane blocking the entire width of the road.

"It's a bad idea because it could be misinterpreted. Does indicating left mean "I'm staying left" or "pass on the left"? We've had this discussion before and found that people have different ideas about what signals mean. Better to use body language - make your intentions obvious by where you place the car."

True I suppose, although I take my context from the demo scene and the unwritten rule i suppose is that hazard lights means a high angle drift, left means im going left and right means im going right.

Alright so you've played through the track and made the quickest times you can and you feel your up to battling other guys. You make a turn and suddenly he crashes you or you crash him. Words fly and basically the crap hits the fan. Whose fault is it? Yours? or his? The answer? Probably both of you guys.

Lines are, in the simplest term, the path you will take when you are
entering and exiting the corner as well as straightways. The first step in respecting lines is understanding your line as well as your opponents. Consider the fact that your entering a chicane side by side that there isn't frankly enough space for you to take your ideal line and vice versa. what do you do? The first step is to imagine the line in which the driver beside you must take and then allow him enough room to take that line. How does he know which line he takes? Well because he should also be imagining the line you will take and then give you room to take it. So in this regard we can see that it is only through the cooperation between both drivers that a collision is avoided.

Sometimes you need to yield your line to the one beside you. When do you do this? This is a bit subjective but generally you need to have at least half a car length lead on the car before you know you have right of way so long as the line isn't extremely suboptimal. Sometimes, like driving on the highway, you will see guys who cut you off, or change lanes without checking their blind spots, do not hesitate to sound the horn. I do this on a daily basis to work every morning. Similarly, before you decide to cut someone AT LEAST check your blind spot. Guys with G25 wheels can bind the paddle shifts to do just that to make it simple and easy to do. This is always good driving /racing practice.

Finally if your slow don't intentionally block someone from passing you or for that matter if your fast don't push the guys car off the track!

Collisions occur when either driver does something careless while avoiding collisions require action on both drivers.

On a side note: I have seen some guys use the signal lights to indicate their intentions. I think thats a creative way to indicate to other drivers your intentions.