I'll just make a quick comment.
We should look at the high-level principle, which is.... Yes, certain things you might click on might take you to different places. We should also consider that you can have two identical computers next to each other, and you're exposed to information on one that you're not on the other, even though you're on the exact same website, just because of your browsing history, for example.
Personally, I wouldn't be as worried about where you're getting directed quite as much as I would be about the message that's there. If there happens to be a banner advertisement sponsored by the Government of Canada, somebody like me would say it's important that all of us have a chance to see that banner advertisement, not only those of us who happen to be exposed to it through social media because of our particular demographics.