I've said it once, and I'll say it again; we only have a limited number of cards that we can use, and of that, only a limited number of those cards are actually good and usable. What happens is that people will use the combos and cards that do best and from that we develop what we call a metagame. Unless you want people to play bad cards and inferior combos for the sake of being original with them.
By asking people not to think up of ideas like Zekrom donk is depriving them of creativity - the creativity you so desperately cling to and admire. What would our world be if people didn't look for the better, faster, and more efficient way of doing something? Back in the dark ages I suspect; if we could even make it that far. I admire the person who created the Uxie donk engine; that took a lot of brain power to figure out. In fact, all of the deck types that exist today evolved into what they are because people tried and tested, and tried again to make the best deck out there. You're playing a GAME, so you have to expect that people will find the best and most efficient ways to win games. If you don't like that, then do something non-competitive, like knitting (although I wouldn't be surprised if even that had competitions...).
And again, your definition of fun is different than other's. My idea of fun is going into a tournament and winning games - I really don't care what deck I use to get that done. The problem is that the people you're describing are people that no one likes anyway - the people who violate the SOTG by being mean, arrogant, and disgusting to other players and treat everyone else very poorly. These people may or may not netdeck. But not all netdeckers are jerks, and I think you're missing that point. Me and all of my friends played netdecks this past season.. I played BLG, someone else played LoxChomp, and another played Gyarados. Our group is probably the most friendly and approachable group in the area because we're always smiling, being friendly, and having fun. But for some reason, you paint us as if we're monsters, out to ruin people's day or something. I don't get it, w/e