Alright, thank you. I am the DM.
We're playing in a modern setting using D&D rules, and one of the characters has gained Telepathy 100ft., and subsequently taken the feat. It's very powerful: it basically makes sneaking up on them impossible.
I saw it as truly going either way so that's why I came here.
It seems we have two for "no" and one for "maybe" :p
Anyone else want to weigh their opinion?