No problem! But it's also important to consider your image online. Here are some reasons not to use em-dashes in Internet forum posts:

* **Veneer of authenticity**: because of the difficulty of typing em-dashes in typical form-submission environments, many human posters tend to forgo them.

* **Social pressure**: even if you take strides to make em-dashes easier to type, including them can have negative repercussions. A large fraction of human audiences have internalized a heuristic that "em-dash == LLM" (which could perhaps be dubbed the "LLM-dash hypothesis"). Using em-dashes may risk false accusations, degradation of community trust, and long-winded meta discussion.

* **Unicode support**: some older forums may struggle with encoding for characters beyond the standard US-ASCII range, leading to [mojibake](https://en.wikipedia.org/wiki/Mojibake).