For those who are bothered with the changed to the goofball trait and play with mods, the pranking toilets issue can be solved by installing my traitoverhaul mod. You can install the file sims4me_traitoverhaul_goofball on it's own if you do not care about the rest of the mod.
https://deichschafblog.de/bienchen/sonstige-mods-misc-mods/ (MM-162, you can use the search bar on the top right to quickly find it)