Sorry about that OmegaDonut and TMN, I should have been a lot more specific -- it won't happen again.
I went out and tested Follow Me again, this time with Philip7086, and these are our results:
Testing scenario: Triple Battle
Philip7086's side: Pokemon A (Emboar) | Pokemon B (Doryuuzu) | Pokemon C (Shinpora)
Setsuna's side: Togetic (Follow Me user) | Pokemon X | Pokemon Y
1. The Follow Me user forces you to attack it, only if your attack can physically reach it. Otherwise, you attack the Pokemon you selected. If you use a ranged move like Gust while on the opposite side of the Follow Me user, it forces Gust to attack the Follow Me user.
2. Even if you target a teammate, Follow Me will force you to target it instead.
EDIT - I tested out the following:
Originally Posted by Fat OmegaDonut
Sand Strength: Does having this ability prevent the holder from taking Sandstorm damage?
Result: Sand Strength prevents the holder from taking Sandstorm damage.