Suggestion: add a can not play role to unranked draft

Hi everyone, first let me say that this isn't any kind of rant post, just a little suggestion. I usually use unranked draft to get some practice in with certain champions or if I am just in the mood to play X character. I think the current setup with selecting a primary role and a secondary role works fine, as I understand if everyone only just selected the one role they wanted, Ques would take way longer and we'd essentially go back to that team builder that did not work. My suggestion is as such: add a role to select that you very much would like to avoid being given, but only in unranked. this way if you are with friends or just really don't want to be given a role you least prefer at that time you can at least go into que knowing you most certainly won't be that.

My problem isn't really that you can be given a role that you weren't anticipating but rather that you were completely not in the mood at all to play. I understand in ranked, you should be capable of playing all roles and that selecting your roles as que time are just but mere preferences and if you get something different then, well tough. And for the most part I think that's the right thing for that environment, because ranked should always be about team building and countering the other picks, so going into a ranked game with a one trick in mind or simply feeling like "I want to play a game as this champ" is not the right attitude. My argument is that to a lot of people though, that IS what unranked is for them. while there is still definitely the draft format going on and counter picking and choosing the right champion to work with current picks is always encouraged, I and a lot of others will sometimes just pick what they want to play for that game for their current role given. The only real problem with this is there have been a lot of times where I que with friends, I usually que mid and top, and they normally cover other roles, and on occasions I get given something like jungle, whereas I would have been completely fine with being given say bot or support.

My point being that there are a lot of occasions where you may feel like playing your primary or secondary roles, but wouldn't mind the others EXCEPT one. I know i'll probably get a lot of flame for this but was just wondering what people thought on here about this idea.