Or you know, use the system we have...
Losing 3LP, then 10 for every other dodge is a good bargain, considering normal LP losses are around 20 per lost game, sure, you can get to waiting for half an hour because of dodging, but the time you have to wait can be used doing other stuff you like to do, resulting in you tilting less. LoL isn't as enjoyable as it is stressful, for me at least, I get a lot of games where whether we lose depends purely on how well I do, since others have no clue what to do or simply keep dying over and over. So you really should just consider that.
Also, if you tilt just because you have to wait 30mins to start another match after a few dodges, then I think you should turn LoL off and come back another day, will be better for both you and teams that would have to deal with you otherwise, also when you'll dodge next day, you will lose only 3LP again, not 10.