If you take a look at your email or your social media account you will notice one thing that has been there for about as long as you have had the account. That is the spam that is accumulating inside of the account. No matter how much we as a society have tried to get rid of spam it seems to always find a way to come out. But the days of when spam was just about advertising is long gone. Back then you could actually laugh about spam and not actually worry about it. These days the wrong spam message can be dangerous and can be something that you should really be concerned about.
The reason why you see so much spam is because the business model works. When you know that you have a cheap way to get your message across and that for every thousand you send, you are sure to make a hundred dollars, you can start to see how tempting it is. But most people know that spam is a nuisance to others so they do not go down that business path. But there are a lot of people who just do not care and will use it as a business tactic anyway. They just want the money that goes along with it.
But in the spam that is being sent out, not all of it is just messages. There are black hat hackers who have realized that all they have to do is to use the techniques of the spammers and they will be able to find an audience for their attacks. Just like the spammers have figured out a way to use black hat techniques such as bot net attacks to make their job easier, black hat hackers have done the same.
Now instead of just a message being found, you will run across items such as executable programs that will allow your computer to be taken over. Or you will find links that will ask you to go to a certain web site only to be victim of a phishing attack. This means that you give over your information to a fake web site and then it is used in an illegal manner.
The overall point is that even though you might be used to spam now, you still have to be wary of it. It is more dangerous now than it ever was before.