Why is ゴミ箱 written in katakana usually?


I know katakana can be used for loanwords, onomatopoeia, strange plants,
animals, for emphasis, and more. However, I don't understand why ゴミ箱 is
written in katakana. Can anyone shed some light on the logic/any relevant
etymology?




According to the web (e.g. [this](http://www.kankyo-
news.co.jp/ps/qn/guest/news/showbody.cgi?CCODE=59&NCODE=468)), using katakana
is a way of clarifying word borders. That is, ゴミ was used for ease of reading.

The linked column and some other web pages mention that ゴミ looks more
pejorative than ごみ, with which I don't really agree. But using クズ looks to me
more despising somehow than くず (this is subjective visual impression).

Food names are often written in katakana, most probably for the same reason
(e.g. ワカメ instead of わかめ).

