We are talking two different things here, I thought you were talking about threads such as the OED which has just been resurrected and had a proper heading, as does Brendan's Barred Puzzles thread of today. You did refer to "words, dictionaries, clueing, setting, or crosswords in general" but these wouldn't come under 'I'm Stuck'.
I have not barred any Crossword relevant threads, such as the two mentioned above, as these could be of interest to all Forum Users.
Yes, I have deleted a few "I'm Stuck" threads but not many, the majority have been renamed with the name of the Crossword once it has been ascertained. It is a Crossword Help Forum and the majority of our Users prefer to have the name of the Crossword in the heading rather than 'I'm stuck'.