Ive not got that low and Im too old now to start, but I wouldnt judge others. Things on the lamp are a lot more cautious than they were. A thermal helps you to reduce a bit of time and to see a lot more wildlife, sometimes where you thought it was lacking. Not so much unsporting as revealing, but the stuff knows you are there, dont forget they already have NV and you need the lamp for rabbits to hold them in there seat, so its back to the lamp as being unsporting.
One of the greatest unsporting tricks ever I was taught by a keeper over 40 years ago was squeaking for Foxs. I was sworn to s