Thanks for responding guys!
Whilst I completely agree with the fact that it is wrong, and damaging to the hobby to needlessly destroy a perfectly good carded figure for U grading, I dont have a problem with sending cut/badly damaged cards for a U grade.
I do think however that the people who are prepared to have MOC's ripped open are entitled to do so! After all, its their item, they own it, therefore they can do as they wish with it!
I love my vintage collection, I would never dream of telling someone what they like to collect is wrong, or right for that matter.
At the end of the day, these are little plastic figures, surely not important enough to warrant some of the insults and sometimes even threats that get handed out if someone thinks they have the right to dictate what you should or should not spend your hard earned money on?