Glad to see others doing this, too! That's actually what my guild does. Whenever someone mentions an interest in raiding in their application (regardless of the fact that our recruitment post says one of our raid teams needs XYZ roles), we tell them upfront that raid spots are NOT guaranteed. If it just so happens that the applicant joins the guild and gets to raid later on, that's great! The applicant is joining the guild, first and foremost; other activities such as raiding are all just perks. We want people who are going to add to and enhance the guild atmosphere, become part of our community... not just show up and take things and then throw a fit if they don't get their way. That's not how a team works. We learned the hard way on several occasions that trying to fill in raid spots with anyone and everyone will quickly ruin more than just the raid.

We recently had to deny an applicant because all the application mentioned was, in a nutshell, "I want loot and progression. I haven't gotten either because other groups/pugs/guild(s) weren't good enough." The first question we asked ourselves as officers was, "So, if this guy doesn't 1) get to raid consistently; 2) get to progress consistently; and 3) get gear consistently, he's just going to leave or, worse yet, get his gear and run if the other two criteria aren't up to his expectations?" The vote was unanimous.