Spam
Hacking
Facts are you'll get hacked within 1 minute if you dont have a firewall or router filtering incoming connections.....google it....any computer is a target and there are hundreds of bot networks out there constantly auto scanning for vunerable systems, no matter if it's microsoft.com or your iphone
yeh lol, what first answerer said -child porn, scam sites.....people are gullible, unethical people use that to their advantage.....