1) So what if they wanna be naughty? You want to become the owner of a naughty dragon? Personally I don't. And if they do want to be naughty, and if you tell them to fight other dragons, that makes you sounds like an evil tyrant leading 7 dragons, fighting every single dragon you meet.
2) Modify ONE page? how many dragonpages exist in the game? I bet you couldn't count all of 'em.
3) Calculations done at our computer? That would make the CPU to work even harder. Many people play DrA as a relaxing game, opening their dragonpage along with several stuff at their computer. That would make the PC thrashed
4) Adopters, NOT TRAINERS. Our dragons are already great the way they are. If you FORCE them to fight (yeah, by doing so, you force them) you don't deserve to be here.
And, another point I wanna add.
-Look up at your browser page, and read the web address. It says DRAGONADOPTERS. Not DRAGONFIGHTERS. If you still want to play force your dragon to fight, make your own website.
-As I said before, you will be forcing them to fight. And, like you said, the dragons could fight each other again and again. If you're forced to fight one of your best friends, every single day, every single night, would you? Try to see this stuff from your DRAGON'S point of view. And, if you say something like "They're just pixel images in a website".......You'll see