In preparation for future PhD work I came up with some ideas & protypes for software components that might later become scientifically relevant, both from a CS and application viewpoint. My natural reflex to having a working proof of concept for an idea is to put it on Github under GPL.
However all (or most) of my colleagues strongly recommend against that before I haven't built any scientific credit based on that code. Their reasoning is that someone else might "steal" the idea and "usurp" the scientific precedence.
Given that the scientific and open source communities do seem a bit detached in places this appears plausible.
Does anyone have actual experience from a similar situation? Did anyone ever have scientific credit stolen from open-sourced code? The other questions, namely 19348 and 17740, don't even mention the appropriation issue. But when it's not an issue, why are my colleagues so frightened about it?