Etiquette 101

Ok, so this is one that I could really go on and on for a VERY long time on.  So, with that in mind, I'll just pick one item for today and leave the rest for another time.  There is a term floating around out there that I do believe that a great number of people should refresh themselves as to it's meaning.  That term is "common courtesy".  While I do not, on any level, believe for a moment that the concept has completely evaporated from society, it would seem that there is a growing number of souls out there who have no concept of this term, much less what it means.  Basically, this means that you take another person into consideration before making any decisions, actions, or whatnot.  It is inappropriate for one to invite themselves to another's home.  Ok, there are exceptions.  There are those that are so close and there is an open-door policy, so to speak.  I have a number of friends that know very well they are welcome to pop by whenever they would like for whatever reason.  Or if a person is ill, or there is a dire emergency, or something along those lines, then it would be acceptable.  However, if the person in question is someone that you have little to no tolerance of, there is no reason for this person to be at your home, then for them to simply invite themselves over knowing full well that their only intention is to make your life miserable, then no.  I had this happen this evening.  There is a soul, misguided as he may be, who decided upon himself that he would invite himself to come over for breakfast in the morning and then spend the day.  He did not ask if it was ok.  He did not ask if I had already made other plans.  He simply made the decision.  As far as I am concerned this is extremely arrogant and rude, among other things.  There is a reason for him to make an appearance, but for anything more than that, there simply is no reason.  This is a man who seemingly enjoys doing whatever he can to disrupt my life.  Sadly, at the moment, there is little I can do for reasons I won't go into.  But this is his way.  He has done this numerous times before, and I'm sure will continue to try again in the future.  But here's the kicker.  This is my fault, to an extent.  You see, this is someone that I have known for a great many years.  And in those years, I taught him to treat me this way.  I would put my plans and dreams and desires on hold.  Granted, I am not the only person he does this with.  But I am the only one responsible for this behavior continuing with me.  Now, it is my job to teach him the correct way to treat me.  Hopefully, in turn, it will teach him how to treat others.  Is it really my job to teach him?  In one sense, no.  That is something he should have, theoretically, learned a long time ago.  But in another sense, yes.  There are those out there who will treat you how you allow them to treat you.  Lesson learned.  I am a peace warrior.  Now, let the teaching begin.