The reason people 'SUGGEST' things is to see if it would help out in any way, and if it is pointless than that 'SUGGESTION' will just be let down. I don't see anything wrong with suggesting anything you personally think would help. Also, you don't need a thread showing you every, single, thread that has been posted on suggestions. I am not sure where I read this or if I was told but if you want to find if a suggestion has already been suggested, Google it.
I see the things you listed and those aren't exactly pointless suggestions, they may have been suggested once or twice but that just shows people want it! Also, toribash for iOS or Android is actually possible, maybe not multiplayer but singleplayer replay making would be possible to make. In fact, multiplayer could also be made because phones are getting more powerful as they upgrade through out the years. The cores are getting bigger and in a few years there may even be a phone with the same power as a Xbox 360 or a PS3. Sound stupid huh? Well doesn't mean its not possible.
I really don't know whether to support or un-support. But seriously, we don't need a thread dedicated to every suggestion ever made and if there was a certain idea which was popular and re-suggested a few times, another player would see that and try to support it by posting on the already made thread and re-suggestion threads are already being moved to threads which fit the same topic. I don't see why we need this.