Should coaches teach cheating?

In another thread I read that an unnamed USS coach was teaching using 2 dolphin kicks in breaststroke pullout,sneaking the first one in after the dive (like Kitajima did.) I had previously heard coaches teaching dolphin kick on the pullout before it was legal saying "I'll keep teaching it until they DQ it." What do you all think of this? I think the refs should watch for this and DQ the swimmers of course,but I think the coach should be flogged I don't care how many Olympians the might have trained.