I'm noticing. Even if I don't say anything about it, I'm noticing. So from now until I decide otherwise, there will be no more favors. I will not be offering any favors to anyone. I will not be saying yes to any favors anyone asks of me.
Fairness is my friend though. So if anyone asks to take me up on any favors I've previously put out on the table, I will be happy to honor those. I am in the middle of a months-long favor to someone, and will happily continue to honor that. No new favors will be manufactured though.