Cryptsy has the largest Doge trading volume now. Doge price there is 30% higher than other markets.

Isn't this too enticing for criminals to resist?

1)  Stop withdrawals for major coins, trap user's fund.
2)  Allow Doge coin withdrawals, in small amount. Suckers (a.k.a customers) will rush to convert other coins into Doge.
3)  Doge price is sky high.
4)  Steal customers' BTC/LTC to buy cheap Dogecoin elsewhere.
5)  Sell those stolen Doge back to customers
6)  Profit

Their best hope now is Doge coin's sudden collapse, making their liability go away, good luck with that.