Like running a coax line to your neighbor’s house so they can use your internet? Sure. A lot comes into play such as the signal strength by the time it makes it through the splices, splits, MOCA adapter and length of wire to the neighbor’s. What if you have issues from the ISP/wiring side? Well then good luck getting a service technician running that call when they see what’s going on.

There’s really too much of a hassle vs just the neighbor paying for their own connection lol.