Adding new cards to player sets

Is it an accepted practice to add cards to the player sets if you do not own them (saw them on Ebay or auctions but did not win them)? I have never done so but was wondering if anyone else has or what the general opinion would be on this.
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It's getting to the point where Basic player sets are becoming less fun to collect, because there is ZERO consistency in what cards make up those sets. PSA pretty much lets any one person affect a registry that involves dozens, or even hundreds of collectors.
The registry is the biggest thing PSA has going for them. If they don't manage the composition of basic player sets better, they are going to lose marketshare in a BIG way...imho.
But the original intent of this thread was: Suppose that I was collecting a player with a playing career that spanned into the mid 80's and the basic set currently is missing a 1982 Donruss card. A 1982 Donruss card of said player then shows up on eBay.
Would adding the certification number to the add cards form be an acceptable practice if you did not win the card but wanted the card in the basic (and master) registry checklist?
<< <i>I understand where you are coming from, I'm getting sick and tired of people adding cards that are not basic set cards to the basic sets. And once it is done, I do not think that PSA will change it (please correct me if I'm wrong). I'm sure that there are more than a few members of player basic sets that are worried about somebody adding some regional issue card to their basic set. It doesn't exactly make it a "basic" set then.
But the original intent of this thread was: Suppose that I was collecting a player with a playing career that spanned into the mid 80's and the basic set currently is missing a 1982 Donruss card. A 1982 Donruss card of said player then shows up on eBay.
Would adding the certification number to the add cards form be an acceptable practice if you did not win the card but wanted the card in the basic (and master) registry checklist? >>
I do not see why it would be a problem. Technically you are doing them a favor and they need that card in the set to be truly complete.
To answer the question - I can't see why not, especially if it's a card that really should be in there. Hopefully it's inclusion would motivate more sellers to list the card you are looking for.
Collecting:
Brett Favre Master Set
Favre Ticket Stubs
Favre TD Reciever Autos
Football HOF Player/etc. Auto Set
Football HOF Rc's
e.g. If a card has only 2 graded cards, then it would not be added to the basic set until 10 (or 15 or whatever amount) cards have been graded. I would think this would help PSA because if someone wants a card in the basic set, then a set number of the card has to be graded before it qualifies for Basic set status.