Those aren't intended actions, and in nearly every race (at least those in the west), it is considered illegal and worthy of disqualification to intentionally make physical contact with another car. And actually in F1, you can't even intentionally use your vehicle to block another car from overtaking.
I haven't watched Touring Car Championships, so I am not sure what the rules on overtaking are.
Those aren't intended actions, and in nearly every race (at least those in the west), it is considered illegal and worthy of disqualification to intentionally make physical contact with another car. And actually in F1, you can't even intentionally use your vehicle to block another car from overtaking.
I haven't watched Touring Car Championships, so I am not sure what the rules on overtaking are.
In F1 you explicitly are allowed to block an overtake. What's not permitted is swerving multiple times to do so.