User blog comment:Chiwise/Summoner Spell Ignite/@comment-4080931-20111030215112

Oh lordy, I can imagine activating Ghost then running through a group of minions when running away from someone with Ignite.

Nevertheless, I wonder about this as well. I think a few people use Ignite on neutrals, but this was a long time ago. It definitely wouldn't hurt to make it not target minions or neutrals.