I happened to call Scottrade the other day on the topic. I asked about getting my stock certificates sent to me so they would not be there in 'street name' to be lent out.
the rep said they don't send out certs for penny stocks and it doesn't matter anyway because they don't allow shorting on a stock under $4. So mine could not be borrowed to be shorted anyway.
(what we are really against is naked short selling)
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