Yes, they are. A few definitions of 'scam' from around the web:
"n. a fraudulent business scheme - vb. deprive of by deceit"
"n. A fraudulent business scheme; a swindle. - v. To defraud; swindle."
"n. a confidence game or other fraudulent scheme, especially for making a quick profit; swindle."
It is quite possible to take advantage of people, but that is not the same as outright defrauding them.
Legitimate lotteries are not scams because they are not fraudulent. They are just a bad deal, in most cases.
Yes, they are. A few definitions of 'scam' from around the web:
"n. a fraudulent business scheme - vb. deprive of by deceit"
"n. A fraudulent business scheme; a swindle. - v. To defraud; swindle."
"n. a confidence game or other fraudulent scheme, especially for making a quick profit; swindle."
It is quite possible to take advantage of people, but that is not the same as outright defrauding them.
Legitimate lotteries are not scams because they are not fraudulent. They are just a bad deal, in most cases.