I love to say you're not gonna win when I see someone buy a scratch off lottery ticket
That's a little mean. Is there a reason why you feel the need to tell someone that they're not going to win the lottery?
Because winning the lottery is really unlikely.
Telling someone that they aren't going to win the lottery isn't nice because it just makes them feel bad. You should say "good luck" or "I hope you win" if someone buys a lottery ticket, because you should want good things to happen to others.
But saying that they won't win imply they are wasting their money.
It's not really a waste, lottery money goes back to the communities like towards schools. I think it's best to thank them and wish them luck instead of being negative, because they are helping the community and getting a chance to win! How about you try buying a ticket, maybe you can win something.