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Heh, dangerous is in the eye of the beholder. I don't even have a trash bin on my system (no desktop, just X and shell windows). 
It is almost always the case that an application written in python that wants to get rid of a file *does* want to really delete it, because it is not operating on user-facing files. It is only when the program is implementing a GUI (and very occasionally when implementing a CLI) that it might want to move something to trash instead.
I'm -1 on this proposal. Most python programs aren't GUI programs, so I don't think any significant fraction of python programs need it, and thus that the ones that do can just include it as a dependency along with all the other dependencies they need. (Yes, you can write a full GUI just using tkinter, but the number of GUI programs that have no non-stdlib dependencies is probably quite small.)
This is the kind of thing that would need to go to python-ideas first in any case, so I'm going to close the issue. If you get consensus that it is a good idea on the python-ideas mailing list, you can re-open the issue.