Gambling
The way I see it, gambling can be very dangerous, but it does not have to be. Like many other issues, I think it is better to practice moderation when it comes to gambling. Gambling could potentially destroy a family, put someone in more debt than can ever be repaid, cause someone to lose his or her home, and it can lead to many physical health problems if it prevents the person from eating or makes him or her worry too much. But if someone sets aside a certain portion of their money and does not spend more than he or she has allotted, then it is really no different than having a budget to go to the movies or out to eat every month.
If you struggle with self-control and keeping yourself in moderation, than you should not gamble, if you do not then it would be ok. The final question you have to ask is whether or not the thing your gambling on is moral. You should not cheat, and you should not bet on anything that is immoral. If you have any questions about this or comments, please let me know.