If not, it's a red flag. Even if they do, it is smart to check those references. The net is freely accessible to everyone and that means anyone can post an opinion. Thoughtless usage can compromise safety. Finally, it is important to pay attention to how much time you spend on-line.
Computers are even more seductive than TV because they are interactive.
If you get up out of your chair and your back or neck hurts, and you are hungry and thirsty, this is an indicator that you've been on too long. Nettiquette is the art of being polite while talking to people you have never met in person and cannot see. Talk to those in chat rooms, bulletin boards, and discussion lists with honesty and good manners. Cussing, harassing, teasing and flaming only draws out the lowest common denominator. Staying out of fights and keeping behavior appropriate is the mark of someone who knows their way around.