Can a kid always be guilty of what he is blamed for, based on his "track record"?

Counseling for behavioral issues won't work, there needs to be a plan put into place so that your son's good behavior is rewarded, and he is encouraged to make better decisions.  You should also be asking the school for a manifestation determination - meaning a specific determination that your son's behavior is not a manifestation of his disability.  Unfortunately, hitting other students is an impulsive type of behavior that often goes along with ADD and ADHD.  Instead of punishing him, or trying to get you to try medications, they need to work on giving him the skills to avoid impulsive behavior and to work on impulse control.  If they have done all of that, and its still not working, then they might be right in suggesting the medication, but not in lieu of medications.  If your son is in special education, he needs to have a behavior plan in place, not just an educational plan.  You should tell the school that they need to set goals and objectives for your son's behavior, and then figure out how they are going to accomplish those goals and objectives, and set a time for each goal to be accomplished, and if all of that STILL doesn't work, then you will be willing to discuss the possibility of medication with them, but not at this time, before other things have been tried.