bradgrafelman;11033033 wrote:What if I'm trying to talk to you about the résumé I've prepared for a job application? Or I'd like to get your opinion on how piña coladas taste? Or what if I'm writing on behalf of my über annoyed fiancée in complaint about the naïveté of your form's input-mangler? 😉
Or what if I type "…" instead of "..." …?
I think the point here is that there are too many "edge cases" to effectively consider all of them in advance. The word résumé, for example, could easily find its way into your form via an autocorrect/complete feature, and then tue user's message would be dropped - through no fault of their own. The en-dashes that Weedpacket mentioned above are also quite common (and correct) in "North American English."
In order to take a "whitelist" approach, you need to know what the use case is.