SUMMARY
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When dragging and dropping an existing location, esp. the home-folder (or other) entry to the trash-location, dolphin moves and / or deletes files, even the userspace, when its the home-folder. You could not expect from a new user to know, what power he has in its hands. locations should be like bookmarks, meaning if you drag a location to the trash, one would expect the location-'bookmark' is deleted, not the real files.
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STEPS TO REPRODUCE
1. produce a location '~' 
2. drag this location to the trash-location 
2.1. and / or rename it to 'XYZ' beforehand –– what could end up in a rename not only of the location-'bookmark' but the whole userspace-folder
3. have fun with a borked system

OBSERVED RESULT
severe problems with the system

EXPECTED RESULT
deletion / rename of the 'place'-placeholder / -reference only, not the referenced files

SOFTWARE/OS VERSIONS
Windows: /
macOS: /
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.27.9 
KDE Frameworks Version: 5.107.0
Qt Version: 5.15.10

ADDITIONAL INFORMATION
/