Wady i zalety portali społecznościowych/Adventages and disadventages of social networking sites.

Hello!
Mam wielką prośbę do osób,które dobrze znają angielski.Potrzebuję sprawdzenia pracy o wyżej podanym tytule.Z góry dziękuję!
Social networking sites are incredibly popular.We know Nasza Klasa,Facebook,Twitter etc.This sites have advantages and disadventages.I write about it below.
We have constant contact with friends.We can share new informations.We can upload photos.
When we have account on social network we should pay attention with somebody talk we.Facebook,Twitter etc. are very dangerous.We give our personal details.Internet and social networking are often addiction .
Social networking sites have adventages and disadventages.We should pay attention and are careful.Lots of celebrites are on Twitter or Facebook.We can write to them.

Praca ma być na około 15 zdań,dlatego tylko tyle:)

'We' (kto to jest to 'we'? anglojez. ludzie nie beda tego rozumieli) know Nasza Klasa,Facebook,Twitter 'etc' (nie pisz 'etc' bo 'etc' to nie jest networking site).'This' (tutaj l. mnoga, bo 'sites-l. mn) sites have advantages and 'disadventages' (blad ortog). I WILL 'write' (nie, uzyj, 'illustrate', 'describe') about 'it' (do czego to 'it' sie odnosi? Nie moze do advan & disadv bo powinna wtedy byc l. mn) below.
We can share new 'informations' (sporawdz ten rzeczownik - to jest niepol).
When we have (brak przedimka) account on (brak przedimka) social network SITE we should pay attention 'with somebody talk we' (co to ma byc? przez translator?) .Facebook,Twitter 'etc' (prosze nie uzywac 'etc' - bo 'etc' w zaden sposob nie moze byc 'dangerous')-. are very dangerous.We give OUT our personal details. Internet and social networking are often 'addiction' (zla czesc mowy) .
Social networking sites have 'adventages' (ortog) and 'disadventages'(ortog).We should pay attention and 'are careful' (kto niby 'jest careful'?) .