What do you think of spreading rumors about a girl that has been spreading rumors about me?
That seems cruel. Are you really going to spread rumors about her?
Yes, I can't stand her and I want to ruin her life
You shouldn't waste your time trying to play her game. It will ultimately end up wasting your time and may even make you out as the bad guy if your rumors get linked back to you.
Other people want me to go down this road so they better stop judging me.
You shouldn't do what other people want you do. Trying to get revenge is bad and it might backfire on you. It might not make you feel better later on to know that you went so far.