I know its not communicating if its a ranked or draft game, but blind pick is the wild west of league. If you want to play Jungle Tanky Lux then I believe nobody should dictate whether you will or not. Blind pick is for fun, so why are people raging in a normals game? Inb4 I lock in 
because people don't want to waste 20 or more minutes just because "lol relax it's just a normal i troll".
I do teambuilder for troll picks. Usually though, it's better to have some friends with you to do that, for a host of reasons. Everyone agreed to it at the beginning of the match, so they kinda can't complain.
Blind pick auto lock is fine, that's the whole purpose of blind pick.
Because for whatever reason some people use blind pick for practice and learning champions.
