is it illegal to create a site similar to facebook and linkedin?

[Nicky]

I mean are there any patents issued for sites like these? If so, then how did facebook enter into the market when orkut had become popular?
And also is it legal to develop another site like amazon. which is an e commerce based site and provide services like online buy and sell?

[BrokenEye]

Of course not. Why do you think there are so bleeding many of them?

[amarnath]

Makin similar website is not illegal i guess, but copying things and stuffs are illegal

Kindly Visit

http://www.newsdrom.com/

[Dani]

Its not illegal to develop a site similar to already existing site, you are not coping the content and the images which already in existence , you are just follow the similar business model in your site.

Having a similar concept is not at all illegal.

You can check with this site http://www.agriya.com/products where they have developed products similar to all popular sites, and they making best business out of it.

[Vasant]

No Its not illegal, every one get inspiration from some where. but copying stuff as it is, not accepted. even patent authority will detect and deny of your product.
But yest you can develop site same as facebook and amazom.