We get given chocolates off offenders occasionally.
My mother tipped the bin man, window cleaner and paperboy 30+ years ago. I can't remember whether I took presents to school or not. Some folk tip the hairdresser, etc etc etc. DH bought presents in for the midwives when I had babies. We took presents in for the nurses after my mum died.
If you want to send a present, do so. If you don't, don't.
I don't like the competitiveness of some parents and I really don't like the situation Spider was subjected to, neither of which I've witnessed at our school (or maybe I'm just oblivious).