Is it legal to use macros ?

Depends on the macro

Setting something like items to your mouse buttons, or binding something to say "warded" with a key press are fine.

Anything that performs a combo play for you automatically are not allowed, and you will get banned for using

I found this topic looking for a specific answer.

I want to make a macro that says something along the lines that I'm going to /ignore all due to most players being toxic if the game barely starts to head towards losing and then /ignore all... would this macro get me banned, do you think? I don't want to have to type it every game.