This question already has an answer here:
My question seems to be a mash up of two questions. The first is that over at TeX.SE there is a question about creating PDFs with crawler resistant email addresses. There are some good answers about creative ways that go way beyond just the boring
name<at>domain<dot>com, but my question is, do these method cut down on spam? This question: Is using 'dot' and 'at' in email addresses in public text still useful? provides an answer for webpages, but not documents like
.doc files. The answer highlights a set of methods based on "dynamic" CSS and PHP methods which are not available for static documents. Further,
.doc files, and to some extent
.doc binary file to find an email is presumably much harder than crawling through plain text. This makes me think that protection in files is potentially different from protection in webpages. Is obfuscation useful for files posted on webpages?