Q: If a unit of models that are Psykers and armed with force
weapons are affected by the You! You’re a Traitor! result of the
Hallucination psychic power from the Telepathy discipline, does
this force them to spend warp charge points (if they have any
available) and activate their force weapons for the hits they inflict
upon their own unit? (Reference section).
A: Yes.
If you are able to active the force weapon I see no reason why you can't active any other special ability, including the Smite Mode. Man that would suck to have to use your one time ability on yourself LOL, but the chances of that happening aren't that great LOL.