Most adults spend almost an hour each day online, communicating by email, instant message and video chat. Or they might be following the daily lives of their friends and family on social networking sites; but while most people say the internet makes their lives better, 70% of adults would like tighter rules for social networking sites.

The amount of time adults spend online is merely the tip of the iceberg compared to time children and teens spend on the internet, 79% of whom claim they had experienced at least one potentially harmful experience online in the past 12 months.

Many internet users are becoming increasingly worried about harmful content - and fear they are more likely to come across it. However, it is becoming widely accepted that the risks are still outweighed by the internet's benefits.

Ofcom's first annual Online Nation report, for example, suggests online bullying affects 51% of 12 to 15-year-olds, and despite governments urging social media companies to take more responsibility for harmful online content, the survey recognises that suicide and self-harm are quickly becoming the second biggest problem experienced by long-term internet users, especially younger respondents.

How much time each day do you spend on the internet? Does this concern you, and do you worry about extensive internet use by friends or family?