"Account sharing?"

#PokemonGO: I have a spawn point in my yard. When my grandchildren are here they login their trainer accounts on my phone to catch the pokemon. Can this get me shadowbanned? They don't have their own phones, so they are never logged in on another device when they use mine. I am almost level 36 and have been playing daily since the first week the game launched last July and don't want to get banned. Is letting them use my phone to log in considered account sharing? via /r/TheSilphRoad http://ift.tt/2raK7Mf