Asking if utf-8 is safe on the basis of these examples seems like asking if we should throw the baby out with the bath water -- along with the toys and the tub

Asking if utf-8 is safe on the basis of these examples seems like asking if we should throw the baby out with the bath water -- along with the toys and the tub for good measure. The potential for abuse is evident, but it seems like these primarily ought to be fixed in userland. For instance, by giving cues by highlighting characters in widely different areas (latin vs cyrillic) or by ignoring rtl for extensions when a string starts in ltr. (Not to mention, in the latter case, if users are opening random docs attached to spammy emails, utf8 is the last of your problems.)