The C152s I fly have no restrictions in the POH. Therefore I both teach it, and have no problem with it as an examiner.
This is one of those myths like 'PA28s aren't cleared for spinning'. I believe there are some models of C172 where it is prohibited in the POH, and possible C150 as well. However the advice in all cases is simple...
Read the POH. If it prohibits it - dont. If it doesnt mention it - its not prohibited - so there is no problem.
In all a/c you fly - make sure you know the a/c you fly!!!
