According to #750, this issue has been raised before, but was only partially addressed.

In its current version, Cura tells the user on first launch that Ultimaker is collecting anonymous slicing statistics and that this can be turned off in the settings.

While this is apparently better than before (where data would be collected without the user's consent), it may still be problematic for some people. If possible, there should be a link in the dialogue that allows disabling data collection immediately. The text doesn't even mention where said option is.

Personally, I would find it preferable to make this option opt-in instead of opt-out by changing the default to false and adapting the text accordingly.

From the feedback I received from fellow Debian maintainers, it seems like leaving this option as-is is not acceptable and will have to be changed for the Debian releases. We are currently discussing if the plugin should be removed altogether (which, I think, is unfair towards Ultimaker) or if we should just change the data collection default to False.