Everyone does negative recruiting, even the bad teams. Negative recruiting is just saying how your school is better than other schools. It's part of the sales process. I don't understand why everyone makes such a big deal about it, unless it's done in a way that clearly violates the rules.
Iowa State does positive recruiting.
"Yes Coach Boeheim, you would love to have Wesley Johnson on your team, he's a great kid."
"Coach Bennett, Justin Hamilton is an excellent kid that just got homesick from Utah, I think Virgina would be a better fit for him than Ames."
"Harrison, North Carolina won the national championship last year, you should go there, Roy Williams is a class act!"
"Doug, Northern Iowa is the best program EVER!! Coach Jacobson is the man and such a cool dude! They actually win son!"