While designing my site I am constantly faced with the issue of whether its ok to TAKE ideas and designs from other sites. In some cases there is no distinction in certain aspec
Stealing code or designs is immoral and in some cases illegal.
Taking inspiration or copying functionality is less of a problem. For example, at some point in time someone realized that putting a "Forgot Password?" link next to all login forms is a good idea, now everyone does it. It's not theft it's just replicating a good idea.