> Ethically speaking - if you have a buddy inside the company, they'll tell you how to prep with information the company wouldn't want you to know anyways.

I feel there are two views on this: From the candidate's perspective, his/her buddy might "owe" it to them to provide additional info which will give them a leg up in the application/interviewing process.

From the buddy's perspective, if they (company/hiring manager) have already decided on one candidate, it _might_ be fruitful to help them get the job, otherwise it would amount to unethical behavior by not giving all the candidates an equal footing.