Generally; I'll only be annoyed if not credited or get a thankful mention and I can see my code and or images, however I am glad people look at my sources and I highly encourage them to at this stage!
The amount of people I've pointed to Beaver and Steve for various things is unreal
I've also pointed people to sunshine's skylines as it has simpler changes and not too many so I can easily direct someone to the change and hopefully they'll notice how to layout the SkinInfo and how to add and replace images and how to change Styles files to show new images instead of the original resources etc.
Anyway back to topic at hand, unless it is a complete clone with few resources changed or only edited the resources present then I do not think that we should complain or take concern.
Copying 'ideas' too once again if the alternative is not a complete clone in the code and resources then I see no problem. After all there will be some alternative ways of doing things.
After all in general we are a great community here, and sort of look out for each other and and help everyone along