CathInfo.com

I agree with you that "It is rarely effective to lecture the opposite sex (unless one is a priest or catechist or a similar position) because it sounds too much like complaining about them." Where you lose me however, is your statement that " It seems especially bad for women to lecture at men because it comes across as a woman taking a position of authority over men."
Let us be clear. When Christ is at the center of a Catholic marriage, the husband has authority over his wife. However that does not mean that men in general have authority over all women. Just as it would be wrong for a random woman to lecture men in general, so also it is wrong for a random man to lecture women in general. Such a man would have absolutely no authority over women.

While it might not be ideal for a random man to lecture women in general (for example, in the context of a forum like this) it is not wrong in the same way it would be if the positions were reversed.  A man lecturing women might be doing something inappropriate but a woman lecturing men is going against Scripture.

[11] Let the woman learn in silence, with all subjection. [12] But I suffer not a woman to teach, nor to use authority over the man: but to be in silence. (I Tim2)

There isn't really anything wrong with this advice, although there is some question as to the poster's right/authority to be saying it.