You could remind them of the 2009 thru 2013 classes where 11 of the 17 recruits transferred or kicked off...
09 - Marcius, Bade, Barlow
10 - A Johnson
11 - Lawson, Hale
12 - R Johnson, Simpson (medical I believe)
13 - Smootherman, Scott, Stephens
Purdue is as guilty as anyone in the transfer department.
Wouldn't include Marcius as we wanted him back but he graduated and left as a 5th year transfer. Simpson had to retire due to being diagnosed with hypertrophic cardiomyopathy as him continuing to play could've killed him. Barlow has the talent but was an idiot. All the others? Yep I'd say that's fair game to judge Purdue on.
That 2011 class was horrible. The 2013 one was solid on paper but clearly didn't work out.