How is this needed? We already have blips for players which is more than enough. It won't make any difference to have a custom blip for the Skoda, if you hate it so much, make a suggestion that it should be limited or removed, this way we rid ourselves of the Skoda reckless drivers.
Either way, the GPS is used for directions. The addition of blips that we currently have is a generous subtle touch to alert us of the presence of players in the proximity so we don't make a mess crashing into each other at every other turn and corner even though we should use our mirrors and instinct rather than the GPS.
Don't ruin it.