I was recently on a United JFK-SFO flight in C sitting on the aisle. The flight attendant spilled hot coffee on me and my laptop while serving drinks. I told him that accidents happen but I was most concerned about the $3000 laptop that he just potentially damaged than my own (washable) clothing. I could tell he felt very bad and brought me 3 Customer Appreciation Certificates for this one flight. Although I don't feel bad about using all of them because that was a pretty significant mishap I'm concerned that United might flag me for abuse. Has anyone else had experience redeeming these?

By the way I am 1K and redeemed one already and received choice of 9000 RDM/$200 e-cert / 10% off.