Why Muslims use yahoo , you-tube and facebook?

[SOLID STATE E]

I am a Muslim .I have been practicing Islam for last 12 years but I am not too good to abandon yahoo, you-tube and facebook but is it not the duty of Muslims to abandon them as there are frequent pornographic advertisement? These advertisements really gives pain to my heart but if I abandon this sites I will be disconnected from world. So can't leave them. Can't we Muslims make website which will be free from pornographic advertisement?
Lattuce how come you claim it haven't you seen in yahoo advertisement of semi nude lady and male in beach and haven't you seen a lady on the green swimming pool wearing red bikini and a loin-cloth.
Moh If I find something Islamic from You-Tube a lot of related Nude videos comes and a lot of related anti-Islamic videos.
Once such a thing fall me and my University teacher into a great shame . It was 2008 April I went to my teacher to get some of his lecture handouts about Analog Electronics he opened hotmail and an advertisement of a semi nude lady in beach appeared. He put himself towards that picture and talked to me I also acted that I haven't seen it. He is an Assistant lecturer . His name is Abdul Mannan.
Thanks to all who gave me the idea of using ad-block and special thanks to the one who gave me the web address to make website.

A sentence made me to laugh that is: we can find Jews and Christians in pornographic regions.lol..

Anyways a person said it is 21st century not 18th century where people swim clothed . I am a male and I swim wearing full trouser. There are also a lot Muslim ladies who swim wearing headscarves .