There is a very simple answer to this, it doesn't involve bans nor does it involve naming people on forums, the race organiser makes everybody taking part in his/her race stand for a minute on the start line and kit check the persons nearset to them, anyone with inadequate kit or no kit gets pulled out and given a bum bag full of heavy rocks to carry round with them, lets face it the real reason runners don't take a kit bag is to run faster, not that it makes any difference anyway..
Then maybe the race organiser could start a list of entratnts who tries there luck for other race organisers to add too or just note.
Bans for amature sport is over the top in my book, too much (HS)