I get the feeling the pilots (recreational) in my area really don’t like drones. I file my flight plans electronically and, maybe this is coincidental but, ever

I get the feeling the pilots (recreational) in my area really don’t like drones. I file my flight plans electronically and, maybe this is coincidental but, every time I file a flight plan a small aircraft will apear right overhead flying low within a few minutes. It happens every time. Sometimes multiple aircraft will arrive and buzz me. I of course have to stay under 400 feet but get this, those pilots are often flying at right around 400. I don’t know what’s going on but it’s weird. I plan to monitor the radio traffic in the area next time if I can find a way to do that.