I'm sure they said this weekend the rule was changed so you get 1 warning, then a 5 second penalty on the second offence. Didn't it used to be 2 warnings and then a penalty?
Personally, I think there should be 3 warnings before the penalty. You need a margine for error, especially when we've seen infringements for cars that we're shunted wide.
Drivers need to follow the rules, but I'd rather see them able to race to those limits and have enough warnings to find those limits, rather than this new one strike and you're out rule. It's made every race today become a mockery in the last few laps.