Let them hop in and keep your 2 seconds. I used to have a 40 minute commute and on a busy morning would have 10-15 people do that. Know how much time that sets me back? 20 to 30 seconds. Following this rule I have a 25 year clean driving record and I guarantee these lane hoppers can’t make that claim
I’ve always preferred the 2 second rule. You don’t need to do distance math in your head, just find a tree and count the time it takes to get from their car to yours.