My method is simply to gently slow down until they are forced to overtake or if a pull in place shows up I will pull in and let them pass.

I don't brake check nor use my reverse lights, however dangerous they may be, I do not want to be the cause of an accident or death, they can do that for themselves.

It's worth noting that in most countries you will be held liable for an accident if you brake check or similar and with dash cams becoming more popular you are likely to be caught. Luckily I rarely encounter tailgaters very often.