For the view from Wikipedia, I suggest what User:Coren (Marc Pelletier, who has done just about
every job at Wikipedia) said in 2014:
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I've been doing adminwork on enwiki since 2007 and I can tell give you
two anecdotal data points:
(a) Previously unknown TOR endpoints get found out because they
invariably are the source of vandalism and/or spam.
(b) I have never seen a good edit from a TOR endpoint. Ever.
A third one I can add since I have held checkuser (2009):
(c) I have never seen accounts created via TOR or that edited through
TOR that weren't demonstrably block evasion, vandalism or (most often)
spamming.
None of this is TOR-specific, the same observations apply to open
proxies in general, and the almost totality of hosted servers. Long
blocks of open proxies or co-lo ranges that time out after years being
blocked invariably start spewing spam and vandalism, often the very day
the block expired.
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(quoted in http://comments.gmane.org/gmane.science.linguistics.wikipedi... )
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I've been doing adminwork on enwiki since 2007 and I can tell give you two anecdotal data points:
(a) Previously unknown TOR endpoints get found out because they invariably are the source of vandalism and/or spam.
(b) I have never seen a good edit from a TOR endpoint. Ever.
A third one I can add since I have held checkuser (2009):
(c) I have never seen accounts created via TOR or that edited through TOR that weren't demonstrably block evasion, vandalism or (most often) spamming.
None of this is TOR-specific, the same observations apply to open proxies in general, and the almost totality of hosted servers. Long blocks of open proxies or co-lo ranges that time out after years being blocked invariably start spewing spam and vandalism, often the very day the block expired.
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(quoted in http://comments.gmane.org/gmane.science.linguistics.wikipedi... )