I effectively just did this. I raised a post titled "Test", added some text and "saved". Then I went back to the post, clicked on "Edit", changed the title to "Post Deleted" and deleted my comments. Do something similar and no one will know the original subject of your post, or what your comments were.
As you should remember, on the GetSat forum it was impossible to edit / delete your comments once another post had been added below.
Although I believe people should be able to delate their own comments, I believe it is definitely WRONG for them to be able to delate other peoples comments. Only the person who wrote the comments (or the moderator) should be able to delete comments.
If I was aware people (other than the moderator) were able to delete MY comments I would probably cease posting on the platform.