Is a man's impersonation of a woman's name or a woman's impersonation of a man's name in writing (such as on the Internet) considered among the resemblances forbidden by Sharia?

It is permissible for a woman to assume a man's name if the intention is good, such as advising men whom she does not wish to know she is a woman, for fear of corruption. It is preferable that the name be common to both men and women. This does not fall under the forbidden imitation of women (tashabbuh), for what is forbidden is that which is exclusive to them in its gender, form, or predominantly in their attire. The ruling follows the intention, and "matters are judged by their intentions."