I'm sure for those who play MOBA's, you understand how I feel.
Instalockers are those who instantly choose a champion, lock it in, and forcibly take a position that someone else has claimed.
Not only is this detrimental to the team, largely due to the original person now having to play another lane with a champion least suited for it, it also causes teamwork malfunctions, as people are bitter due to the stolen position.
Secondly, a lot of times, the players are often bad at holding their lane against their enemy, dragging the entire team down. I had a game, not so long ago, in which a person instalocked Ahri at mid lane, causing a Karthus to resort to jungling, a Gragas to resort to support and a Diana to resort to top lane. I was ADC at the time. Not only did she lose her lane, but gave Master Yi (enemy jungle) quite a bit of kills, which made him basically impossible to beat late game, but a Gragas support leaves much to be desired.
I mean literally, it just causes way more problems than it's supposed to and basically ruins the game for those who wanted to play a semi-decent game.
If you really want a lane badly, perhaps ask if someone takes it. Not everyone in this game is selfish, but some are willing to give up a spot. Secondly, if you can't get the lane you want, suck it up. You're not going to get everything in life and learning how to play other lanes or roles will help you later on.
Anyways, done with my rant.
~Kuroneko