First of all, this isn't really the place to discuss this as this is a thread about an event that will be distributed over wifi.
Secondly, I've said numerous times that the purpose of collecting the events here and posting them where anyone can get them is for those who weren't able to attend an event either related to issues of having the spare time, or geographic problems.
That's great that you were willing to drive so far to get an event. Most people can't. Most events (like the Japanese ones) aren't even available in all countries.
Re-posting them here gives others the chance to have them as well. It doesn't affect you. It doesn't de-value yours in any way. Yours is still special to you because of the effort you put in to getting it and it serves as a memento of the event you attended.
If you're worried about events from here being traded around... if you're trading events, you really shouldn't be trading stuff like this with people you don't know and trust, anyway. The only "worth" these events have are personal worth.
We don't hide these away and make them available only to a select few because we don't feel stuff like this should be hoarded. It should be shared with everyone. As for the "proof" factor... we DO ask for proof (such as a photo), but most of the bogus submissions usually get cleared up and fixed rather quickly since numerous people attend these events.
A lot of your post seems to be directed at event trading communities (the parts about collecting all dates/characteristics/natures) and I think that's rather misplaced, since there isn't really any event trading happening in this community.
At any rate, this is the wrong place to discuss this.