I agree 100% that rub plays are designed to prevent defenders from covering receivers. I already mentioned that as a concern. But there are legal rub plays within the line of scrimmage perfectly legal. But honestly that it is not a valid argument for designing plays that have no other purpose than to subvert a rule like the reporting rule. If you could tell me theres was some other purpose for the play than to either confuse the refs or to deprive Dallas of knowing who is the eligible receiver, it would not be a problem.. I also guess there would be incentive to design illegal rub plays if the officials were too stupid to or incompetent to notice them, but it would still not be ethical to design them. Designing plays to subvert rules is unethical, sleazy, and unscrupulous and there is no argument around this.