Online Casinos Without Online Presence/Community
From my observations, I think online casinos without online presence or community of users are likely to scam any user and get away with it easily, and it doesn't matter if they have a high trust rating, this is because when they refuse to process your withdrawal and the customer support is not responding or not helping, the user in reality have no place to complain that will force the casino to pay him of lose a great number of their users if not all...
Like for example, if a casino have a community on bitcointalk, and you are a user of that casino, at any time you have an issue with that casino and the customer support is not helping, bringing such issue to their community on bitcointalk will force the casino to find solution(s) immediately so that they don't lose their other customers in the case where they are the ones at fault..
But a casino without any kind of community anyway, if as a user, you encounter any problems and the customer refuse to help you, you are absolutely helpless, and complaining on forums where the casino is not even known won't help because it does not affect the casino on their business, they probably won't see your complaints, neither would their other customers do, so certainly, they won't answer and their other customers also don't know what is going on.. So it is best to avoid such casinos in my best opinion..
This is just one out of many types of online casinos to avoid, so let's make the discussion long, what other types of online casinos do you think gamblers should avoid? You never can tell, your advice might help someone in a short of long way.
Sometimes that works the other way around too. Scammers pool people into signature campaigns to advertise on their behalf only to be found as scammers once they have already dealt the damage. The one thing you must always keep in mind is make sure you are only collaborating with trusted and reputable people on the internet, especially in this forum. There are already established managers who would deem which is which for us but at the end of the day it doesn't hurt to do your own research as well. Again, communities can work either way, in favor of the scammer or against it.