Are there any consequences/effects from not using blinkers?

From what i have found they do have an influence although not a very strong one on traffic as follows, btw this was done through my own testing which i can produce video for if needed.

• indicators don't influence in any way the cars which are directly behind you
• They sometimes influence cars in the lane next to you, this is most prominant if your lane is ending.
• The most obvious influence i have seen is with oncoming traffic which i have found will only let you turn if you have your indicator on.

I know it is a shame that indicators don't work how they should but if you do a search you can find several "realistic" indicator mods to improve this.

Hope this helped