Some public perspectives of people in the fields of astrophysics and science communication (by no means exhaustive):
Alice Bell, science and technology writer:
https://twitter.com/alicebell
Katie Mack, theoretical astrophysicist:
https://twitter.com/AstroKatie/status/532509765989965824
Jennifer Hoffman, astronomer:
https://twitter.com/astroprofhoff/status/532762036510285824
Chanda Hsu Prescod-Weinstein, theoretical astrophysicist:
https://twitter.com/IBJIYONGI/status/532769640762445824
Seth Zenz, CERN particle physicist:
https://twitter.com/sethzenz/status/532508092752478208
Sean Carroll, theoretical cosmologist:
https://twitter.com/seanmcarroll/status/532672520357306369
Renee Hlozek, theoretical cosmologist:
http://statsandstrings.blogspot.com.au/2014/11/hey-grrrl-reasons-why-im-furious-about.html
Women in Astronomy:
http://womeninastronomy.blogspot.com.au/2014/11/rosetta-shirtstorm-sexism-stem.html
Maryn McKenna, science journalist for Wired and National Geographic:
https://twitter.com/marynmck/status/532981583905849344
Phil Plait, astronomer and public speaker (runs the "Bad Astronomy" blog on Slate):
https://twitter.com/BadAstronomer/status/533105970575331329
Thomas Levenson, Professor of science writing at MIT:
https://twitter.com/TomLevenson/status/533359454470045696
Meg Rosenburg, science communicator:
https://twitter.com/trueanomalies/status/532961893967622144
Carolyn Porco, planetary scientist, Cassini imaging lead, CICLOPS director (responding to a tweet by Richard Dawkins in which he called the shirt's critics "bullies who could never do anything 1/100th as clever as landing on a comet"):
https://twitter.com/carolynporco/status/533728652739899392
Emily Willingham, scientist and science writer:
https://twitter.com/ejwillingham/status/533356011168346112
Jacquelyn Gill, assistant professor at University of Maine:
https://twitter.com/JacquelynGill/status/533472965967757312
Janet Stemwedel, philosopher and blogger at Scientific American:
https://storify.com/docfreeride/to-the-science-guys-who-want-to-understand-shirtst