As lead of the moderation team, I can assure you that it's policy not to delete ideas, certainly not when we "don't feel like it" or disagree.
The only cases when an idea is moved (never fully deleted) is when it's an obvious support request to get something done or fixed to somebody's own board. We then move the topic to the Support forums.
Please do let me know if there are specific ideas that you are missing that you feel have been deleted and I will do my best to hunt them down and see what's happened with them. I dislike cherry picking as much as you do, if not more. The Ideas section is specifically there to see what the community wants and to gather feedback. Which is exactly the reason why it is policy never to touch those topics.