Following several years of black plastic mulching a plot of horsetail, and smiling off more than the odd friendly jibe about it, I now have a clean plot. Additionally, a fair degree of respect too, as some that wondered what on earth I was doing can now see the result and understand the motivations. One of my neighbours presently has my plastic sheeting mulching his horsetail plot, after a season of trying, in vain, to continually hoe it off.
So leading by example can have an influence on others decision making, even though this can take time. But if your plot looks “the biz”, you may have an odd newcomer asking for some advise…best of luck with it.