web crawler - Why does simple email obfuscation work so well? -


for example replacing @ at. @ least 1 study demonstrated effectiveness:

to our surprise, none of crawlers visited our departmental research , course , research web pages led spam on email addresses containing at.

another experiment demonstrated same thing, showing using at , dot reduced spam 2 orders of magnitude.

the first study speculated spammers obtain enough plain-text email addresses ignore obfuscated ones. parsing at in addition @ should trivial. why don't spammers account such simple obfuscation?

i no expert...but intuitively makes sense @ symbol less commonly used in non-email-related speech. @ sign set email address apart other text. if use at, blends in normal english.

at pretty common word after :p i'm sure still possible parse out "at" version of email, more difficult of regex.


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