Foreword: they do not look good on everyone. Or at least, this would depend....on how wide, long, or colorful they are.
Conclusion: they are fashionable (as is almost every respectable spring-summer collection, after all). What can we do about it? Well, I just don't know!
If you wish to be trendy, very trendy, choose them wide, optical and preferably black and white, or at least in strong contrasting tones. This way you will avoid accentuating small physical defects, which will combine with the colors and shapes you are wearing. 'NO' to stripes which are too thin! This NO is not a flat out NO, and that is just because I still haven't figured out how to actually wear them!
The striped look can be adapted, more or less to any context: playful and young, if the stripes are in strong color contrast for an evening of fun; or more formal when on a jacket or a shirt, perhaps for a job interview or a reunion. Striped accessories are synonyms of a marked personality; basically, if you would like to be remembered for your strong fashion sense.
Additionally, as with each summer, the navy trend is back, the one which should have you feeling like a neglected, but nonetheless always cheerful, girl - blond, smiling and tanned!
Ter et Bantine