I just don't use Japanese here for several reasons. The primary one is that my readers are obviously going to be English speakers. A lot of them are family and friends who don't have the ability to display foreign language special characters installed on their machines. Using Japanese in my posts results in gibberish for them. Beyond that though, I don't believe any useful purpose is really served in writing things like "食パン" instead of
I have a confession to make. I don't like it when people who are primary English speakers and who write content for a primarily English audience unnecessarily use Japanese words or writing in their blogs. I don't mind if they use the Japanese to explain something or make something clear so that folks know what the Japanese writing looks like. In such cases, it serves as a reference point for those who want to be able to pick out a particular item and need to match characters to objects in real life. I also don't mind if their blog is clearly directed at a bi-lingual or multi-lingual audience or if the blog is about their efforts to learn Japanese and including that content facilitates their learning. Before anyone gets their hackles up, I'm not referring to any specific person and certainly not to any of my regular commenters, but just to some overall trends I've noticed when perusing a great variety of web sites and forums.
It gets to me when people use Japanese just to look or sound cool or appear authoritative. A grand example of this was on a forum I was perusing about cooking. The site is all in English and all about food. The topic at hand was whether or not people prefer light or dark chocolate. Not one person in the thread was Japanese but someone replied to a post with "(original poster's name)-san" and ended it with "yoroshiku." The poster was clearly a native speaker of English (this was clear from content in other posts he made) and the usage of Japanese terms was an attempt to show off a modicum of Japanese knowledge. It's incredibly pretentious to do this in such a forum and almost certainly was done to attract attention.
I don't have many pet peeves but people who go out of their way to show off is definitely one of them. There's a difference between offering esoteric knowledge or specific terms in an appropriate context and shoehorning them in just to impress people and the latter is an immature way of trying to demonstrate superiority.