I think as a developer it must suck, if your code is merely "copy & pasted" by a inferior developer and then used for their personal gain. Like we are seeing being done with Bitcoin now. Most of these forks are just a copy & paste job and it is not backed by good developers.
Most of the developer didn't give a shit about who use their code, although some of them may want to have a credit for it. It is the nature of open source to make anyone can make the good use of the code.
The fact that it is then pumped to replace Bitcoin, is actually a slap in the face to the developers who contributed the most to the original Bitcoin. Satoshi's code being raped and pillaged by people who says that they are protecting it. ^joke^
They are a volunteer who doing its job freely for the bitcoin ecosystem without forced they only want to make Bitcoin better. and in my opinion, the more a project being forked the more worthwhile the project is.