While I may not advocate her position in regards to gaming and sexism, I believe she has every right to ask for donations for any cause she sees fit, be it in USD or Bitcoins. Donations are voluntary, you don't have to donate if you do not support her position.
@OP Why don't you ask them directly if they would accept donations in Bitcoins? They have a contact form on their website.
http://www.feministfrequency.com/contact/In my opinion, the more people accept Bitcoin for any purpose, the merrier.
Thanks for contributing the
first neutral post on the subject on this thread. That it had to take 12 pages is
slow progress, but still it is
progress. I'm not losing my hope for the 1st decentralized cryptocurrency that was created in 2009!

Would it be a good idea to ask Fem Freq to accept Bitcoin? Maybe tell her to add a donations address on her homepage. She can use Coinbase or BitPay. That would be the easiest step.