Refs need to have some discretion. I'm not a football guy, but it looked to me like the first one was simply a dirty play that deserved ejection no matter what you call the penalty. The other two looked more borderline to me and appeared in the context of normal play. I thought almost immediately about what you're talking about. How long will it be before a quarterback "fakes" sliding, has a defender pull up and then bolts for another fifteen yards? If the targeting and head contact are going to be penalties, then there has to be some type of misconduct penalty for trying to lure a defensive player into the penalty. If they are trying to protect the offensive players, they should not be allowed to sucker defensive players into it.