You are right, this may be an abuse, but as everyone knows, the number of police players is less. I will give a positive answer to this suggestion, but on the condition that you replace 7 seconds with 4 seconds. It's really more than 7 seconds. I am currently neutral
As far as I know that only Regina can place stingers, I guess it's one of its features since it costs 70 millions and not everyone can purchase it due to its price.I am going to vote negative as there should be such features exist on OP vehicles like Regina.
Enforcer car which costs like probably 500k or more has this feature which is placing stingers while being Inside.
If so, then there should be a restriction for Enforcer only, not Regina due to the reasons I stated above.