Turn signals on motorized vehicles are no longer needed because they have lost their effectiveness.
Turning to Side street
If you see someone coming while exiting a subdivision, don’t trust their turn signal. You never know when someone forgot to turn it off or accidentally hit it. They can’t hear the audible clicking of the signal because they’re blasting their sub-woofers. You have to wait for them to commit to the turn.
Changing Lanes on Interstate
The only thing a turn signal is good for on the interstate is to let some know to speed up and block you from changing lanes. The only way to change lanes is to swerve and signal half way-through as to avoid a ticket.
Signalling to park will only invite others to steal the spot from you. Fist-a-cuffs will ensue. Just park far away from the store because exercise is good for you and getting your face broken is not good.
Go Old School
Stop bowing to the Gods of Illumination and Electricity and use what God gave you. Use only arm and hand signals. Makes it easier to extend a kind wave after someone lets you in (or other hand gestures). If you are on a motorcycle, look over your shoulder with a stern look and point to the lane you intend to enter.