Insta Locking in normals vs calling lanes first.

I'm sure everyone has experienced some form of this at one point. You call a lane and pick a champ you like. Lo and behold someone has already locked a champ that would occupy the same lane. My first question is: Is insta locking bad behavior? Personally I find calling and then selecting much more appropriate and im OK with adjusting my role when someone called first. But considering these are normals, maybe you just do what you want and go where you please. People argue that if you want more structure one should play ranked or team builder, which are legitimate arguments What to do if someone instalocks? If one argues insta locking is acceptable, because normals are for fun, then wouldn't u just play whatever you wanted in the first place, regardless if that resulted in two adcs two mids and a solo top? Or should one adjust their role?

Any thoughts on isnta locking are appreciated