There's no reason to torture the acronym just to avoid a perceived stigma. Not wanting something developed near you is NIMBYism. NIMBYism can be reasonable or unreasonable. You can label an opinion NIMBY as an implied insult or with no judgement at all.
It's less about associated stigmas and more about the usage of NIMBY becoming so generic as to lose value. I also doubt the removal of a single letter does much to fool people into forgetting about the stigmas anyways.