Well i think better way to deal out is to stop the withdrawal or payout(onchain) until the deposit by a user/player gets 1 confirmation or further more confirmations that a site owner is suitable with.Also same should be with account balance transfer.Most of the sites uses that to prevent loss of double -spending
It seems you don't really understand what people are actually discussing about. The problem isn't withdrawing a double spent deposit, but rather people depositing money that can be easily double spent, gambling with it a risky way (like going 2x with his entire balance). If the bet wins, then he will let the deposit confirm and not double spend it. If he loses, he double spends the transaction and even though he lost money, he didn't actually lose it because he changed the transaction, and the gambling site owner gains nothing, but has a chance to lose money.
Double spending is so very difficult to do, if at all. I wouldn't even be worried about it. I mean when's the last time this has even happened ? I haven't heard of double spending forma very long time.
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there is nothing to find it is literary on the first page of blockchain.info
https://blockchain.info/double-spendsand i gotta say this is not a serious thing, nor a common thing that happens. look at this page and look at the
dates and times the newest one is from yesterday. so it is not like people are double spending thousands of tx!!
also i should add that from all that list not all are fraud. there are times where you double spend to include more fees for your tx to get confirmed.
p.s. this is avoidable easily with 1 confirmation requirement.
I didn't look for it yet, since I was on my phone and it's hard to look for stuff on the mobile version. It is a serious thing for gambling site owners. Sure, it might not be done everyday, but one person could do a deposit with 1 bitcoin, double spend if he loses, but he could try bets like 10x, which would allow the casino owner a chance to lose 9 bitcoin with a very low chance for reward (the double spend fails). Even if it's done once every week, it still hurts.