I'm going to hit on chicks the day after a break up
Seriously? Do you feel guilty doing that?
Absolutely not! It's my right to hit on chicks!
It is insensitive to hit on people so close to breakups. They probably don't want to move on that quickly so you should wait a bit.
Oh, I've already had sex with a lot of chicks right after they broke up.
I urge you to consider their feelings. You are taking advantage of vulnerable people. You'd get a lot more respect if you take a different approach.