The feminist campaigner who received abuse on Twitter said she was "hugely relieved" that defendants John Nimmo and Isabella Sorley have pleaded guilty.
Caroline Criado-Perez tweeted: "This is not a joyful day, these two abusers reflect a small drop in the ocean, both in terms of the abuse I received across July and August, but also in terms of the abuse that other women receive online.
Thank you to those of you who have offered your support today. For obvious reasons I am staying off twitter (cont) http://t.co/GwilIHuUqn
"I hope that for some people who are watching, this conviction will be a warning: online abuse is not consequence-free".
Ms Criado-Perez added that she will stay off Twitter as much as possible today "as inevitably the renewed attention will mean renewed abuse".
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The world's first ever 'hole in the wall' was installed in Enfield, north London, on June 27 1967.