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
I think most designers and developers draw a distinction between 'creative inspiration' derived from someone else's work and blatant plagiarism. I wouldn't think twice about peeking under the hood to see how someone had done a particularly nifty javascript effect, or implemented a tricky piece of css elegantly, but I'd find it distasteful to blatantly cut and paste that same code for use in my own development.
I'm not learning anything by just grabbing and reusing - although I think it's fairly standard to have the same code to hand as a rough scaffold from which to explore my own way of implementation. I think that's the way a lot of people work.