Does any of you implement such behavior?
Else I will do it.
You can create a file with this content in your preferences directory*. This (cute) script installs Epicea after 3 seconds after opening a fresh image; during that time, a big centered "cancel" button is displayed to help you in a eventual case in which you don't want Epicea to be loaded.
*: the preferences directory is a mechanism of Pharo offers for
personal scripts. You can know your preferences directory by evaluating
this code: FileLocator preferences asFileReference.