What does you think nobody can run with your money in a normal lotery?
I mean, how do you know a casino will pay you out if you hit the jackpot, what makes you think euromilions can't run away with your money?
Casino's and lotery's mostly put up pictures in advertisments of winners with a verry big cheque, and online casino's buy a license in Cyprus. But that doesn't mean they can't run away with your money. If the only thing you have is a number of a swiss bankaccount, you're pretty screwed too
A casino lottery system and an anonymous entity using an anonymous currency online is vastly different. A public business is held to much more scrutiny and if they cheat their customers, they are ruined for life (whereas a person around here can just create a new account the new day after a scam like nothing ever happened)
And running away with the money would be plain stupid, in the short run it would give me some coins and a bad reputation, a good reputation is much more valuable than those 100.000BTC. Don't forget, this is not the only site I have, the url I used before to host the bitcoin images will be home of a much bigger project. And I prefer 1000BTC from donations than 100.000BTC I stole from people who trusted me and even gived me some donations.
For an internet scammer, 100,000 BTC (Or roughly $6,500 USD per todays standards) is definitely worth the hassle. I'm not accusing you of anything yet, but I'm just stating that it's not pennies and there are a lot of deceitful people that would go for an opportunity like that, especially when they can disappear tomorrow without a trace.