safty issues how to protect your self using it

there are many saftey issues with using it for example: cyber bullying, and if you put to many of your personal details on line you can be put at risk from stranges from the internet to protect yourself you can not put all your personal infomation online for example ful name,address, phone nummber ect.., and to protect your data you could set up a back up on your computer this will keep all your files safe.