ARAM "Blacklist"

So, I was thinking, do you ever play an ARAM and you have no rerolls, but you get the one -- the ONE -- champ you can't stand? I love playing ARAMs but every time I end up with a champ I just really don't want to play (whether it's one of my own [I'm looking at you, Soraka] or the FtP champs [the ones I can't play for shit]), I just KNOW I'll end up getting them in an ARAM.

What I'm proposing is that in our champion pool (outside of match or maybe before a match begins) there be an option to "Blacklist" a champion, so that they can't appear in an ARAM. You can only have one champion "Blacklisted" at a time, but can change it at any point. It might also be preferable that there is either a level requirement or a required number of champions before "Blacklisting" is available.

Alternatively, I was thinking there might be an "DARAM" mode (Drafted ARAM) in which teams can ban certain champs, then are randomly given champs that weren't banned. This could work in either format: you ban your own weak champions that you don't want; or you ban the opponents strong champions you don't want them to have.

Reasoning: For me, ARAM is mostly fun in the "random" aspect. Therefore, I don't care for "picking" my champions, but I hate getting champions I don't much care for when I don't have rerolls (and I refuse to dodge just because I don't like my champ). I think this solution could help stop some dodging, or with the alternative option could stop some repetitive strong champs.

This is just an idea I thought of, sorry if it's been thought of before. Let me know of any thoughts, comments, etcetera.