[quote=@Xaltwind]
Probably a result of the RPGuild admin team not trusting GMs/Topic-creators to not abuse the ability to delete other peoples' posts in the threads tthey've made. That, or making the ability to delete your own posts isn't easily implemented into the current site's code or something.

I do remember that prior to the complete site-crash of 2010, you [i]could[/i] delete your own posts though.
[/quote]

Also the possibility of folks harassing a thread and then covering their tracks from moderation by deleting those posts. Which is why self-deleting posts is also not a thing.

Best y'all can do is hire a mod to make the post invisible.