I once had an ISP (non-U.S., won't name it here) that injects ads into plain HTTP. Didn't realize it was the ISP until I once accidentally loaded my personal we

I once had an ISP (non-U.S., won't name it here) that injects ads into plain HTTP. Didn't realize it was the ISP until I once accidentally loaded my personal website over plain HTTP. Turns out to get rid of that, I just had to call them and complain about it; they pretended to be surprised and asked me for details, but after the phone call the injection stopped. Worked for other people too.