I agree that it would be good that this forum should retain focus on crossword clues, although I do confess to enjoying the occasional diversion of a non-crossword puzzle such as Kate's recent "fruit & veg" (as do others it seems, from the enthusiastic answers therin).
I think that it's good and healthy to have a diversity of people from different backgrounds visit this forum.
As a very quick, probably statistically-flawed test of the perception that this forum is being diluted I went back over the last 100 threads and categorised them into three groups (based on their title &/or starting post):
1) Crossword help requested
2) Non-Crossword puzzle help requested (e.g. cryptic clues for Yorkshire Place names)
3) Other (e.g. this thread).
88 x 'Crossword help requested'
6 x 'Non-Crossword puzzle help requested'
6 x 'Other'.
I was quite harsh in marking "away" from the category 'Crossword help requested' although I did not read every post to see if the title was misleading or the original post had been hijacked.
Best wishes ... JimC