Nigel:
I stand corrected on the transmission issue. However, it seems that according to your source we are dealing with Herpes Simplex type 1 "HSV Type 1 infections are tiny, clear, fluid-filled blisters that most often occur on the face" taken from your link, the common cold sore, which millions of Americans suffer from, it simply occurs in another location (generally the forehead due to wounds that wrestlers often have there). What you are saying is that anyone that is exposed to the HSV type 1 should self exclude themself from competition.
Your source states that "Most people get Type 1 infections during infancy or childhood. They usually catch it from close contact with family members or friends who carry the virus. It can be transmitted by kissing, sharing eating utensils, or by sharing towels." Does this mean that we should test all the kids wrestlers before they are allowed to wrestle since most cases are contracted during infancy or childhood?
According to the article posted at
http://www.emedicine.com/med/topic1006.htm the herpes simplex is considered a "ubiquitous" pathogen. This means a disease that almost everyone is exposed to. In fact 50% of people in a high socioeconomic class produce antibodies and 80% of those in lower Socioeconomic classes produce antibodies. Based on your arguement that those that are exposed should "self exclude" themselves, very few people would be left to compete.
I do think that we should make every effort to keep participants safe, but having kids stop wrestling because they contracted a disease they probably have had since childhood seems ridiculous to me. As long as coaches, parents, and competitors make every attempt to keep athletes safe, there should be no problem. Nigel, you said it yourself in an earlier post: "A simple cold sore on the mouth is not in my mind something that terrible." What does it matter if the cold sore pops up on your mouth or your forehead if it is the same virus. Get treatment, wait for it to go away, and get back to wrestling.
If you are truly that worried about it, I would make sure you don't go kissing any girls or sharing a fork with anybody.