I agree, I am not surprised that they do things like that one bit, I would prefer they not do things like that, but the reality is there are a lot of dishonest people out there, a large concentration of them seem to be at EA, or come out when studios fall under their wing.
I hate to say it but this probably wasn't a case of dishonesty or some internally promoted nefarious actions. Consider how it must feel to be an employee at Bioware right about now. You just spent a year and half of your life working on a game, and when it comes out, it is blasted by fans and reviewers. I think that any of us finding ourselves in that position would be tempted to jump on metacritics and post a more favorable review. In all honesty, most of the reviews on metacritics are overly harsh and give the game no credit for actually being at least partially fun.
End of kenata's quote
Have to agree with Kenata here. Add to everything he said the fact that there are reasonable signs to suggest that at least a significant portion of the negative reviews on metacritic are themselves fradulant, and it's pretty easy for a misguided employee to justify writing their own review. Doesn't make it right, but I doubt it's part of a conspiracy or a company policy.