I've heard that damage for acid tubes is calculated by proximity to them, and that the splash damage animation doesn't indicate the actual area of damage. That is, if they are over the big doors of the Alien base on Tremor, even though the acid balls hit the floor, Humans below receive very little damage, because the acid tubes are relatively far away. Is this the case, and if so, is it not general knowledge? It seems like a lot of grangers hang acid tubes where they look really cool, splash a lot of animated damage around, and do very little in the way of actually hurting attacking Humans. I know that it's good to get them where they can cause damage to rushers, but are out of the line of fire (especially of the Human pulsers and lucis). In the interest of educating my future teammates, please clarify.
Do hanging acid tubes really cause damage to Humans, and how high is too high to hang them?