Are men's opinions and ideas now of lesser value?
Do we now need to divide and identify opinions and ideas along sexist lines?
It seems to be the more effort put into trying to accuse sexist (racist, islamist, etc.) ideas, the more a reverse and apparently venegeful effect appears.
The projection of malice.
If you look for something hard enough, you will find it. If not, you can just pretend.
When a man's (singular) opinion is an attempt to explain away a woman's fears/concerns, then I certainly take it at less value. Few wanted to even acknowledge that she had a legitimate reason for concern and went as far to say that perhaps her avatar invited unwanted advances.
One doesn't need to look too hard at the thread to see a woman's concerns devalued by several people. (and yes, women can do this to other women too) What makes it 'mansplaining' is that multiple men saw fit to reply immediately with "advice." They did not even allow for the possibility that perhaps they'd learn something from a few women had they simply watched and read for a while. Rather it was, "Here, let me fix this for you. And let me tell you what you did wrong." Pretty textbook stuff.
If they really felt compelled, then how about a PM with something to the effect, "Hey I'm sorry this happened. Please know that you can report creepy dudes to mods and block them too." Pretty simple.