User blog comment:The Milkman/Madness and Genius/@comment-2228120-20121208125451/@comment-98.240.62.123-20121208233550

There is loads of evidence listed here: http://social.bioware.com/forum/1/topic/355/index/13414717/1

Arrival was one of many incidents.

Derelict Reaper(Direct contact, not to mention inside it), Sovereign on Eden Prime, Sovereign at the Citadel, Rannoch(very close), Tuchunka(Close enough to high five the dang Reaper), all the Reaper tech Shepard salvages randomly. The Reaper tech Shepard obtains on one of the N7/Cerberus missions that has oily shadows coming from it. The Rachni Queen nest in ME3 has Reaper Tech all over, etc. The Reaper canon on earth, the Reaper that the missile keeps missing, Harbinger.

These are off the top of my head, way more than you claim and considering the amount of actual Reapers Shepard has been in contact with, is plenty without Arrival.

"never shown hearing voices in his head while awake" Actually, he is on the citadel when TIM is controlling him if we presume a literal interpretation. There might be more examples, but you also thought he hardly had any contact with Reapers and Reaper tech LOL.

Which the events of Arrival were still canon, even without Shepard, right? Well one fact you can learn that is still true without Shepard, is Reapers mess with Dreams. This is also learned on the Derelict Reaper as is Hallucinations. Add on the Oily Shadows being directly an indoctrination side effect and the Dreams are instantly shown to being effected by Indoctrination.

The kid disappears in the vents, Liara shows us that moving in vents is loud. Even for a child we should hear movement, especially how fast the kid is gone. Yet instead we hear a Reaper growl inside the Vent which is correlated with Indoctrination. Not to mention the impossible distance the kid traveled to get there in the first place and it's behavior.

Shortly after the game came out the Bioware forums were filled with "OMG TEH CHILD IS AN HULLUCINATIONZ!".... This was before anyone knew about the ending and way before Indoctrination Theory came out. The majorities' first impression was that he was an hallucination, Bioware not denying this.

To say it wasn't in the narrative and doesn't fit for Shepard to be undergoing indoctrination even in the slightest bit is nonsense knowing such first impressions, and that Bioware actually DID make Shepard suffer things that are Indoctrination side effects. Indoctrination is subtle, but only to observers... those who see the first hand experience like the Character's dreams, what they see, or what they hear, etc are going to have a better clue beforehand.